PHP根据抖音的分享链接来抓包抖音视频

现在抖音是个很火的短视频平台，上面有许多不错的小视频。今天教大家怎么用PHP技术来获取到抖音上的的内容。

1：打开抖音选中你认为好的视频点击分享，复制链接，然后你会获取到如下的内容：

　　#科比 愿你去的地方也有篮球陪伴，也能披着24号紫金战衣！ #动态壁纸 https://v.douyin.com/36xkCS/ 复制此链接，打开【抖音短视频】，直接观看视频！

这段内容就是我们进行抓包使用的路径。

2：需要使用到php解析html类库文件simple_html_dom

　　创建 simple_html_dom.php 代码如下：

 <?php
 /**
  * Website: http://sourceforge.net/projects/simplehtmldom/
  * Acknowledge: Jose Solorzano (https://sourceforge.net/projects/php-html/)
  * Contributions by:
  *     Yousuke Kumakura (Attribute filters)
  *     Vadim Voituk (Negative indexes supports of "find" method)
  *     Antcs (Constructor with automatically load contents either text or file/url)
  *
  * all affected sections have comments starting with "PaperG"
  *
  * Paperg - Added case insensitive testing of the value of the selector.
  * Paperg - Added tag_start for the starting index of tags - NOTE: This works but not accurately.
  *  This tag_start gets counted AFTER \r\n have been crushed out, and after the remove_noice calls so it will not reflect the REAL position of the tag in the source,
  *  it will almost always be smaller by some amount.
  *  We use this to determine how far into the file the tag in question is.  This "percentage will never be accurate as the $dom->size is the "real" number of bytes the dom was created from.
  *  but for most purposes, it's a really good estimation.
  * Paperg - Added the forceTagsClosed to the dom constructor.  Forcing tags closed is great for malformed html, but it CAN lead to parsing errors.
  * Allow the user to tell us how much they trust the html.
  * Paperg add the text and plaintext to the selectors for the find syntax.  plaintext implies text in the innertext of a node.  text implies that the tag is a text node.
  * This allows for us to find tags based on the text they contain.
  * Create find_ancestor_tag to see if a tag is - at any level - inside of another specific tag.
  * Paperg: added parse_charset so that we know about the character set of the source document.
  *  NOTE:  If the user's system has a routine called get_last_retrieve_url_contents_content_type availalbe, we will assume it's returning the content-type header from the
  *  last transfer or curl_exec, and we will parse that and use it in preference to any other method of charset detection.
  *
  * Found infinite loop in the case of broken html in restore_noise.  Rewrote to protect from that.
  * PaperG (John Schlick) Added get_display_size for "IMG" tags.
  *
  * Licensed under The MIT License
  * Redistributions of files must retain the above copyright notice.
  *
  * @author S.C. Chen <me578022@gmail.com>
  * @author John Schlick
  * @author Rus Carroll
  * @version 1.5 ($Rev: 196 $)
  * @package PlaceLocalInclude
  * @subpackage simple_html_dom
  */

 /**
  * All of the Defines for the classes below.
  * @author S.C. Chen <me578022@gmail.com>
  */
 define('HDOM_TYPE_ELEMENT', 1);
 define('HDOM_TYPE_COMMENT', 2);
 define('HDOM_TYPE_TEXT',    3);
 define('HDOM_TYPE_ENDTAG',  4);
 define('HDOM_TYPE_ROOT',    5);
 define('HDOM_TYPE_UNKNOWN', 6);
 define('HDOM_QUOTE_DOUBLE', 0);
 define('HDOM_QUOTE_SINGLE', 1);
 define('HDOM_QUOTE_NO',     3);
 define('HDOM_INFO_BEGIN',   0);
 define('HDOM_INFO_END',     1);
 define('HDOM_INFO_QUOTE',   2);
 define('HDOM_INFO_SPACE',   3);
 define('HDOM_INFO_TEXT',    4);
 define('HDOM_INFO_INNER',   5);
 define('HDOM_INFO_OUTER',   6);
 define('HDOM_INFO_ENDSPACE',7);
 define('DEFAULT_TARGET_CHARSET', 'UTF-8');
 define('DEFAULT_BR_TEXT', "\r\n");
 define('DEFAULT_SPAN_TEXT', " ");
 define('MAX_FILE_SIZE', 600000);
 // helper functions
 // -----------------------------------------------------------------------------
 // get html dom from file
 // $maxlen is defined in the code as PHP_STREAM_COPY_ALL which is defined as -1.
 function file_get_html($url, $use_include_path = false, $context=null, $offset = -1, $maxLen=-1, $lowercase = true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
 {
     // We DO force the tags to be terminated.
     $dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);
     // For sourceforge users: uncomment the next line and comment the retreive_url_contents line 2 lines down if it is not already done.
     $contents = file_get_contents($url, $use_include_path, $context, $offset);
     // Paperg - use our own mechanism for getting the contents as we want to control the timeout.
     //$contents = retrieve_url_contents($url);
     if (empty($contents) || strlen($contents) > MAX_FILE_SIZE)
     {
         return false;
     }
     // The second parameter can force the selectors to all be lowercase.
     $dom->load($contents, $lowercase, $stripRN);
     return $dom;
 }

 // get html dom from string
 function str_get_html($str, $lowercase=true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
 {
     $dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);
     if (empty($str) || strlen($str) > MAX_FILE_SIZE)
     {
         $dom->clear();
         return false;
     }
     $dom->load($str, $lowercase, $stripRN);
     return $dom;
 }

 // dump html dom tree
 function dump_html_tree($node, $show_attr=true, $deep=0)
 {
     $node->dump($node);
 }

 /**
  * simple html dom node
  * PaperG - added ability for "find" routine to lowercase the value of the selector.
  * PaperG - added $tag_start to track the start position of the tag in the total byte index
  *
  * @package PlaceLocalInclude
  */
 class simple_html_dom_node
 {
     public $nodetype = HDOM_TYPE_TEXT;
     public $tag = 'text';
     public $attr = array();
     public $children = array();
     public $nodes = array();
     public $parent = null;
     // The "info" array - see HDOM_INFO_... for what each element contains.
     public $_ = array();
     public $tag_start = 0;
     private $dom = null;

     function __construct($dom)
     {
         $this->dom = $dom;
         $dom->nodes[] = $this;
     }

     function __destruct()
     {
         $this->clear();
     }

     function __toString()
     {
         return $this->outertext();
     }

     // clean up memory due to php5 circular references memory leak...
     function clear()
     {
         $this->dom = null;
         $this->nodes = null;
         $this->parent = null;
         $this->children = null;
     }

     // dump node's tree
     function dump($show_attr=true, $deep=0)
     {
         $lead = str_repeat('    ', $deep);

         echo $lead.$this->tag;
         if ($show_attr && count($this->attr)>0)
         {
             echo '(';
             foreach ($this->attr as $k=>$v)
                 echo "[$k]=>\"".$this->$k.'", ';
             echo ')';
         }
         echo "\n";

         if ($this->nodes)
         {
             foreach ($this->nodes as $c)
             {
                 $c->dump($show_attr, $deep+1);
             }
         }
     }

     // Debugging function to dump a single dom node with a bunch of information about it.
     function dump_node($echo=true)
     {

         $string = $this->tag;
         if (count($this->attr)>0)
         {
             $string .= '(';
             foreach ($this->attr as $k=>$v)
             {
                 $string .= "[$k]=>\"".$this->$k.'", ';
             }
             $string .= ')';
         }
         if (count($this->_)>0)
         {
             $string .= ' $_ (';
             foreach ($this->_ as $k=>$v)
             {
                 if (is_array($v))
                 {
                     $string .= "[$k]=>(";
                     foreach ($v as $k2=>$v2)
                     {
                         $string .= "[$k2]=>\"".$v2.'", ';
                     }
                     $string .= ")";
                 } else {
                     $string .= "[$k]=>\"".$v.'", ';
                 }
             }
             $string .= ")";
         }

         if (isset($this->text))
         {
             $string .= " text: (" . $this->text . ")";
         }

         $string .= " HDOM_INNER_INFO: '";
         if (isset($node->_[HDOM_INFO_INNER]))
         {
             $string .= $node->_[HDOM_INFO_INNER] . "'";
         }
         else
         {
             $string .= ' NULL ';
         }

         $string .= " children: " . count($this->children);
         $string .= " nodes: " . count($this->nodes);
         $string .= " tag_start: " . $this->tag_start;
         $string .= "\n";

         if ($echo)
         {
             echo $string;
             return;
         }
         else
         {
             return $string;
         }
     }

     // returns the parent of node
     // If a node is passed in, it will reset the parent of the current node to that one.
     function parent($parent=null)
     {
         // I am SURE that this doesn't work properly.
         // It fails to unset the current node from it's current parents nodes or children list first.
         if ($parent !== null)
         {
             $this->parent = $parent;
             $this->parent->nodes[] = $this;
             $this->parent->children[] = $this;
         }

         return $this->parent;
     }

     // verify that node has children
     function has_child()
     {
         return !empty($this->children);
     }

     // returns children of node
     function children($idx=-1)
     {
         if ($idx===-1)
         {
             return $this->children;
         }
         if (isset($this->children[$idx])) return $this->children[$idx];
         return null;
     }

     // returns the first child of node
     function first_child()
     {
         if (count($this->children)>0)
         {
             return $this->children[0];
         }
         return null;
     }

     // returns the last child of node
     function last_child()
     {
         if (($count=count($this->children))>0)
         {
             return $this->children[$count-1];
         }
         return null;
     }

     // returns the next sibling of node
     function next_sibling()
     {
         if ($this->parent===null)
         {
             return null;
         }

         $idx = 0;
         $count = count($this->parent->children);
         while ($idx<$count && $this!==$this->parent->children[$idx])
         {
             ++$idx;
         }
         if (++$idx>=$count)
         {
             return null;
         }
         return $this->parent->children[$idx];
     }

     // returns the previous sibling of node
     function prev_sibling()
     {
         if ($this->parent===null) return null;
         $idx = 0;
         $count = count($this->parent->children);
         while ($idx<$count && $this!==$this->parent->children[$idx])
             ++$idx;
         if (--$idx<0) return null;
         return $this->parent->children[$idx];
     }

     // function to locate a specific ancestor tag in the path to the root.
     function find_ancestor_tag($tag)
     {
         global $debugObject;
         if (is_object($debugObject)) { $debugObject->debugLogEntry(1); }

         // Start by including ourselves in the comparison.
         $returnDom = $this;

         while (!is_null($returnDom))
         {
             if (is_object($debugObject)) { $debugObject->debugLog(2, "Current tag is: " . $returnDom->tag); }

             if ($returnDom->tag == $tag)
             {
                 break;
             }
             $returnDom = $returnDom->parent;
         }
         return $returnDom;
     }

     // get dom node's inner html
     function innertext()
     {
         if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
         if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

         $ret = '';
         foreach ($this->nodes as $n)
             $ret .= $n->outertext();
         return $ret;
     }

     // get dom node's outer text (with tag)
     function outertext()
     {
         global $debugObject;
         if (is_object($debugObject))
         {
             $text = '';
             if ($this->tag == 'text')
             {
                 if (!empty($this->text))
                 {
                     $text = " with text: " . $this->text;
                 }
             }
             $debugObject->debugLog(1, 'Innertext of tag: ' . $this->tag . $text);
         }

         if ($this->tag==='root') return $this->innertext();

         // trigger callback
         if ($this->dom && $this->dom->callback!==null)
         {
             call_user_func_array($this->dom->callback, array($this));
         }

         if (isset($this->_[HDOM_INFO_OUTER])) return $this->_[HDOM_INFO_OUTER];
         if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

         // render begin tag
         if ($this->dom && $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]])
         {
             $ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();
         } else {
             $ret = "";
         }

         // render inner text
         if (isset($this->_[HDOM_INFO_INNER]))
         {
             // If it's a br tag...  don't return the HDOM_INNER_INFO that we may or may not have added.
             if ($this->tag != "br")
             {
                 $ret .= $this->_[HDOM_INFO_INNER];
             }
         } else {
             if ($this->nodes)
             {
                 foreach ($this->nodes as $n)
                 {
                     $ret .= $this->convert_text($n->outertext());
                 }
             }
         }

         // render end tag
         if (isset($this->_[HDOM_INFO_END]) && $this->_[HDOM_INFO_END]!=0)
             $ret .= '</'.$this->tag.'>';
         return $ret;
     }

     // get dom node's plain text
     function text()
     {
         if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
         switch ($this->nodetype)
         {
             case HDOM_TYPE_TEXT: return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
             case HDOM_TYPE_COMMENT: return '';
             case HDOM_TYPE_UNKNOWN: return '';
         }
         if (strcasecmp($this->tag, 'script')===0) return '';
         if (strcasecmp($this->tag, 'style')===0) return '';

         $ret = '';
         // In rare cases, (always node type 1 or HDOM_TYPE_ELEMENT - observed for some span tags, and some p tags) $this->nodes is set to NULL.
         // NOTE: This indicates that there is a problem where it's set to NULL without a clear happening.
         // WHY is this happening?
         if (!is_null($this->nodes))
         {
             foreach ($this->nodes as $n)
             {
                 $ret .= $this->convert_text($n->text());
             }

             // If this node is a span... add a space at the end of it so multiple spans don't run into each other.  This is plaintext after all.
             if ($this->tag == "span")
             {
                 $ret .= $this->dom->default_span_text;
             }

         }
         return $ret;
     }

     function xmltext()
     {
         $ret = $this->innertext();
         $ret = str_ireplace('<![CDATA[', '', $ret);
         $ret = str_replace(']]>', '', $ret);
         return $ret;
     }

     // build node's text with tag
     function makeup()
     {
         // text, comment, unknown
         if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

         $ret = '<'.$this->tag;
         $i = -1;

         foreach ($this->attr as $key=>$val)
         {
             ++$i;

             // skip removed attribute
             if ($val===null || $val===false)
                 continue;

             $ret .= $this->_[HDOM_INFO_SPACE][$i][0];
             //no value attr: nowrap, checked selected...
             if ($val===true)
                 $ret .= $key;
             else {
                 switch ($this->_[HDOM_INFO_QUOTE][$i])
                 {
                     case HDOM_QUOTE_DOUBLE: $quote = '"'; break;
                     case HDOM_QUOTE_SINGLE: $quote = '\''; break;
                     default: $quote = '';
                 }
                 $ret .= $key.$this->_[HDOM_INFO_SPACE][$i][1].'='.$this->_[HDOM_INFO_SPACE][$i][2].$quote.$val.$quote;
             }
         }
         $ret = $this->dom->restore_noise($ret);
         return $ret . $this->_[HDOM_INFO_ENDSPACE] . '>';
     }

     // find elements by css selector
     //PaperG - added ability for find to lowercase the value of the selector.
     function find($selector, $idx=null, $lowercase=false)
     {
         $selectors = $this->parse_selector($selector);
         if (($count=count($selectors))===0) return array();
         $found_keys = array();

         // find each selector
         for ($c=0; $c<$count; ++$c)
         {
             // The change on the below line was documented on the sourceforge code tracker id 2788009
             // used to be: if (($levle=count($selectors[0]))===0) return array();
             if (($levle=count($selectors[$c]))===0) return array();
             if (!isset($this->_[HDOM_INFO_BEGIN])) return array();

             $head = array($this->_[HDOM_INFO_BEGIN]=>1);

             // handle descendant selectors, no recursive!
             for ($l=0; $l<$levle; ++$l)
             {
                 $ret = array();
                 foreach ($head as $k=>$v)
                 {
                     $n = ($k===-1) ? $this->dom->root : $this->dom->nodes[$k];
                     //PaperG - Pass this optional parameter on to the seek function.
                     $n->seek($selectors[$c][$l], $ret, $lowercase);
                 }
                 $head = $ret;
             }

             foreach ($head as $k=>$v)
             {
                 if (!isset($found_keys[$k]))
                     $found_keys[$k] = 1;
             }
         }

         // sort keys
         ksort($found_keys);

         $found = array();
         foreach ($found_keys as $k=>$v)
             $found[] = $this->dom->nodes[$k];

         // return nth-element or array
         if (is_null($idx)) return $found;
         else if ($idx<0) $idx = count($found) + $idx;
         return (isset($found[$idx])) ? $found[$idx] : null;
     }

     // seek for given conditions
     // PaperG - added parameter to allow for case insensitive testing of the value of a selector.
     protected function seek($selector, &$ret, $lowercase=false)
     {
         global $debugObject;
         if (is_object($debugObject)) { $debugObject->debugLogEntry(1); }

         list($tag, $key, $val, $exp, $no_key) = $selector;

         // xpath index
         if ($tag && $key && is_numeric($key))
         {
             $count = 0;
             foreach ($this->children as $c)
             {
                 if ($tag==='*' || $tag===$c->tag) {
                     if (++$count==$key) {
                         $ret[$c->_[HDOM_INFO_BEGIN]] = 1;
                         return;
                     }
                 }
             }
             return;
         }

         $end = (!empty($this->_[HDOM_INFO_END])) ? $this->_[HDOM_INFO_END] : 0;
         if ($end==0) {
             $parent = $this->parent;
             while (!isset($parent->_[HDOM_INFO_END]) && $parent!==null) {
                 $end -= 1;
                 $parent = $parent->parent;
             }
             $end += $parent->_[HDOM_INFO_END];
         }

         for ($i=$this->_[HDOM_INFO_BEGIN]+1; $i<$end; ++$i) {
             $node = $this->dom->nodes[$i];

             $pass = true;

             if ($tag==='*' && !$key) {
                 if (in_array($node, $this->children, true))
                     $ret[$i] = 1;
                 continue;
             }

             // compare tag
             if ($tag && $tag!=$node->tag && $tag!=='*') {$pass=false;}
             // compare key
             if ($pass && $key) {
                 if ($no_key) {
                     if (isset($node->attr[$key])) $pass=false;
                 } else {
                     if (($key != "plaintext") && !isset($node->attr[$key])) $pass=false;
                 }
             }
             // compare value
             if ($pass && $key && $val  && $val!=='*') {
                 // If they have told us that this is a "plaintext" search then we want the plaintext of the node - right?
                 if ($key == "plaintext") {
                     // $node->plaintext actually returns $node->text();
                     $nodeKeyValue = $node->text();
                 } else {
                     // this is a normal search, we want the value of that attribute of the tag.
                     $nodeKeyValue = $node->attr[$key];
                 }
                 if (is_object($debugObject)) {$debugObject->debugLog(2, "testing node: " . $node->tag . " for attribute: " . $key . $exp . $val . " where nodes value is: " . $nodeKeyValue);}

                 //PaperG - If lowercase is set, do a case insensitive test of the value of the selector.
                 if ($lowercase) {
                     $check = $this->match($exp, strtolower($val), strtolower($nodeKeyValue));
                 } else {
                     $check = $this->match($exp, $val, $nodeKeyValue);
                 }
                 if (is_object($debugObject)) {$debugObject->debugLog(2, "after match: " . ($check ? "true" : "false"));}

                 // handle multiple class
                 if (!$check && strcasecmp($key, 'class')===0) {
                     foreach (explode(' ',$node->attr[$key]) as $k) {
                         // Without this, there were cases where leading, trailing, or double spaces lead to our comparing blanks - bad form.
                         if (!empty($k)) {
                             if ($lowercase) {
                                 $check = $this->match($exp, strtolower($val), strtolower($k));
                             } else {
                                 $check = $this->match($exp, $val, $k);
                             }
                             if ($check) break;
                         }
                     }
                 }
                 if (!$check) $pass = false;
             }
             if ($pass) $ret[$i] = 1;
             unset($node);
         }
         // It's passed by reference so this is actually what this function returns.
         if (is_object($debugObject)) {$debugObject->debugLog(1, "EXIT - ret: ", $ret);}
     }

     protected function match($exp, $pattern, $value) {
         global $debugObject;
         if (is_object($debugObject)) {$debugObject->debugLogEntry(1);}

         switch ($exp) {
             case '=':
                 return ($value===$pattern);
             case '!=':
                 return ($value!==$pattern);
             case '^=':
                 return preg_match("/^".preg_quote($pattern,'/')."/", $value);
             case '$=':
                 return preg_match("/".preg_quote($pattern,'/')."$/", $value);
             case '*=':
                 if ($pattern[0]=='/') {
                     return preg_match($pattern, $value);
                 }
                 return preg_match("/".$pattern."/i", $value);
         }
         return false;
     }

     protected function parse_selector($selector_string) {
         global $debugObject;
         if (is_object($debugObject)) {$debugObject->debugLogEntry(1);}

         // pattern of CSS selectors, modified from mootools
         // Paperg: Add the colon to the attrbute, so that it properly finds <tag attr:ibute="something" > like google does.
         // Note: if you try to look at this attribute, yo MUST use getAttribute since $dom->x:y will fail the php syntax check.
 // Notice the \[ starting the attbute?  and the @? following?  This implies that an attribute can begin with an @ sign that is not captured.
 // This implies that an html attribute specifier may start with an @ sign that is NOT captured by the expression.
 // farther study is required to determine of this should be documented or removed.
 //        $pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
         $pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-:]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
         preg_match_all($pattern, trim($selector_string).' ', $matches, PREG_SET_ORDER);
         if (is_object($debugObject)) {$debugObject->debugLog(2, "Matches Array: ", $matches);}

         $selectors = array();
         $result = array();
         //print_r($matches);

         foreach ($matches as $m) {
             $m[0] = trim($m[0]);
             if ($m[0]==='' || $m[0]==='/' || $m[0]==='//') continue;
             // for browser generated xpath
             if ($m[1]==='tbody') continue;

             list($tag, $key, $val, $exp, $no_key) = array($m[1], null, null, '=', false);
             if (!empty($m[2])) {$key='id'; $val=$m[2];}
             if (!empty($m[3])) {$key='class'; $val=$m[3];}
             if (!empty($m[4])) {$key=$m[4];}
             if (!empty($m[5])) {$exp=$m[5];}
             if (!empty($m[6])) {$val=$m[6];}

             // convert to lowercase
             if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower($key);}
             //elements that do NOT have the specified attribute
             if (isset($key[0]) && $key[0]==='!') {$key=substr($key, 1); $no_key=true;}

             $result[] = array($tag, $key, $val, $exp, $no_key);
             if (trim($m[7])===',') {
                 $selectors[] = $result;
                 $result = array();
             }
         }
         if (count($result)>0)
             $selectors[] = $result;
         return $selectors;
     }

     function __get($name) {
         if (isset($this->attr[$name]))
         {
             return $this->convert_text($this->attr[$name]);
         }
         switch ($name) {
             case 'outertext': return $this->outertext();
             case 'innertext': return $this->innertext();
             case 'plaintext': return $this->text();
             case 'xmltext': return $this->xmltext();
             default: return array_key_exists($name, $this->attr);
         }
     }

     function __set($name, $value) {
         switch ($name) {
             case 'outertext': return $this->_[HDOM_INFO_OUTER] = $value;
             case 'innertext':
                 if (isset($this->_[HDOM_INFO_TEXT])) return $this->_[HDOM_INFO_TEXT] = $value;
                 return $this->_[HDOM_INFO_INNER] = $value;
         }
         if (!isset($this->attr[$name])) {
             $this->_[HDOM_INFO_SPACE][] = array(' ', '', '');
             $this->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
         }
         $this->attr[$name] = $value;
     }

     function __isset($name) {
         switch ($name) {
             case 'outertext': return true;
             case 'innertext': return true;
             case 'plaintext': return true;
         }
         //no value attr: nowrap, checked selected...
         return (array_key_exists($name, $this->attr)) ? true : isset($this->attr[$name]);
     }

     function __unset($name) {
         if (isset($this->attr[$name]))
             unset($this->attr[$name]);
     }

     // PaperG - Function to convert the text from one character set to another if the two sets are not the same.
     function convert_text($text)
     {
         global $debugObject;
         if (is_object($debugObject)) {$debugObject->debugLogEntry(1);}

         $converted_text = $text;

         $sourceCharset = "";
         $targetCharset = "";

         if ($this->dom)
         {
             $sourceCharset = strtoupper($this->dom->_charset);
             $targetCharset = strtoupper($this->dom->_target_charset);
         }
         if (is_object($debugObject)) {$debugObject->debugLog(3, "source charset: " . $sourceCharset . " target charaset: " . $targetCharset);}

         if (!empty($sourceCharset) && !empty($targetCharset) && (strcasecmp($sourceCharset, $targetCharset) != 0))
         {
             // Check if the reported encoding could have been incorrect and the text is actually already UTF-8
             if ((strcasecmp($targetCharset, 'UTF-8') == 0) && ($this->is_utf8($text)))
             {
                 $converted_text = $text;
             }
             else
             {
                 $converted_text = iconv($sourceCharset, $targetCharset, $text);
             }
         }

         // Lets make sure that we don't have that silly BOM issue with any of the utf-8 text we output.
         if ($targetCharset == 'UTF-8')
         {
             if (substr($converted_text, 0, 3) == "\xef\xbb\xbf")
             {
                 $converted_text = substr($converted_text, 3);
             }
             if (substr($converted_text, -3) == "\xef\xbb\xbf")
             {
                 $converted_text = substr($converted_text, 0, -3);
             }
         }

         return $converted_text;
     }

     /**
     * Returns true if $string is valid UTF-8 and false otherwise.
     *
     * @param mixed $str String to be tested
     * @return boolean
     */
     static function is_utf8($str)
     {
         $c=0; $b=0;
         $bits=0;
         $len=strlen($str);
         for($i=0; $i<$len; $i++)
         {
             $c=ord($str[$i]);
             if($c > 128)
             {
                 if(($c >= 254)) return false;
                 elseif($c >= 252) $bits=6;
                 elseif($c >= 248) $bits=5;
                 elseif($c >= 240) $bits=4;
                 elseif($c >= 224) $bits=3;
                 elseif($c >= 192) $bits=2;
                 else return false;
                 if(($i+$bits) > $len) return false;
                 while($bits > 1)
                 {
                     $i++;
                     $b=ord($str[$i]);
                     if($b < 128 || $b > 191) return false;
                     $bits--;
                 }
             }
         }
         return true;
     }
     /*
     function is_utf8($string)
     {
         //this is buggy
         return (utf8_encode(utf8_decode($string)) == $string);
     }
     */

     /**
      * Function to try a few tricks to determine the displayed size of an img on the page.
      * NOTE: This will ONLY work on an IMG tag. Returns FALSE on all other tag types.
      *
      * @author John Schlick
      * @version April 19 2012
      * @return array an array containing the 'height' and 'width' of the image on the page or -1 if we can't figure it out.
      */
     function get_display_size()
     {
         global $debugObject;

         $width = -1;
         $height = -1;

         if ($this->tag !== 'img')
         {
             return false;
         }

         // See if there is aheight or width attribute in the tag itself.
         if (isset($this->attr['width']))
         {
             $width = $this->attr['width'];
         }

         if (isset($this->attr['height']))
         {
             $height = $this->attr['height'];
         }

         // Now look for an inline style.
         if (isset($this->attr['style']))
         {
             // Thanks to user gnarf from stackoverflow for this regular expression.
             $attributes = array();
             preg_match_all("/([\w-]+)\s*:\s*([^;]+)\s*;?/", $this->attr['style'], $matches, PREG_SET_ORDER);
             foreach ($matches as $match) {
               $attributes[$match[1]] = $match[2];
             }

             // If there is a width in the style attributes:
             if (isset($attributes['width']) && $width == -1)
             {
                 // check that the last two characters are px (pixels)
                 if (strtolower(substr($attributes['width'], -2)) == 'px')
                 {
                     $proposed_width = substr($attributes['width'], 0, -2);
                     // Now make sure that it's an integer and not something stupid.
                     if (filter_var($proposed_width, FILTER_VALIDATE_INT))
                     {
                         $width = $proposed_width;
                     }
                 }
             }

             // If there is a width in the style attributes:
             if (isset($attributes['height']) && $height == -1)
             {
                 // check that the last two characters are px (pixels)
                 if (strtolower(substr($attributes['height'], -2)) == 'px')
                 {
                     $proposed_height = substr($attributes['height'], 0, -2);
                     // Now make sure that it's an integer and not something stupid.
                     if (filter_var($proposed_height, FILTER_VALIDATE_INT))
                     {
                         $height = $proposed_height;
                     }
                 }
             }

         }

         // Future enhancement:
         // Look in the tag to see if there is a class or id specified that has a height or width attribute to it.

         // Far future enhancement
         // Look at all the parent tags of this image to see if they specify a class or id that has an img selector that specifies a height or width
         // Note that in this case, the class or id will have the img subselector for it to apply to the image.

         // ridiculously far future development
         // If the class or id is specified in a SEPARATE css file thats not on the page, go get it and do what we were just doing for the ones on the page.

         $result = array('height' => $height,
                         'width' => $width);
         return $result;
     }

     // camel naming conventions
     function getAllAttributes() {return $this->attr;}
     function getAttribute($name) {return $this->__get($name);}
     function setAttribute($name, $value) {$this->__set($name, $value);}
     function hasAttribute($name) {return $this->__isset($name);}
     function removeAttribute($name) {$this->__set($name, null);}
     function getElementById($id) {return $this->find("#$id", 0);}
     function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}
     function getElementByTagName($name) {return $this->find($name, 0);}
     function getElementsByTagName($name, $idx=null) {return $this->find($name, $idx);}
     function parentNode() {return $this->parent();}
     function childNodes($idx=-1) {return $this->children($idx);}
     function firstChild() {return $this->first_child();}
     function lastChild() {return $this->last_child();}
     function nextSibling() {return $this->next_sibling();}
     function previousSibling() {return $this->prev_sibling();}
     function hasChildNodes() {return $this->has_child();}
     function nodeName() {return $this->tag;}
     function appendChild($node) {$node->parent($this); return $node;}

 }

 /**
  * simple html dom parser
  * Paperg - in the find routine: allow us to specify that we want case insensitive testing of the value of the selector.
  * Paperg - change $size from protected to public so we can easily access it
  * Paperg - added ForceTagsClosed in the constructor which tells us whether we trust the html or not.  Default is to NOT trust it.
  *
  * @package PlaceLocalInclude
  */
 class simple_html_dom
 {
     public $root = null;
     public $nodes = array();
     public $callback = null;
     public $lowercase = false;
     // Used to keep track of how large the text was when we started.
     public $original_size;
     public $size;
     protected $pos;
     protected $doc;
     protected $char;
     protected $cursor;
     protected $parent;
     protected $noise = array();
     protected $token_blank = " \t\r\n";
     protected $token_equal = ' =/>';
     protected $token_slash = " />\r\n\t";
     protected $token_attr = ' >';
     // Note that this is referenced by a child node, and so it needs to be public for that node to see this information.
     public $_charset = '';
     public $_target_charset = '';
     protected $default_br_text = "";
     public $default_span_text = "";

     // use isset instead of in_array, performance boost about 30%...
     protected $self_closing_tags = array('img'=>1, 'br'=>1, 'input'=>1, 'meta'=>1, 'link'=>1, 'hr'=>1, 'base'=>1, 'embed'=>1, 'spacer'=>1);
     protected $block_tags = array('root'=>1, 'body'=>1, 'form'=>1, 'div'=>1, 'span'=>1, 'table'=>1);
     // Known sourceforge issue #2977341
     // B tags that are not closed cause us to return everything to the end of the document.
     protected $optional_closing_tags = array(
         'tr'=>array('tr'=>1, 'td'=>1, 'th'=>1),
         'th'=>array('th'=>1),
         'td'=>array('td'=>1),
         'li'=>array('li'=>1),
         'dt'=>array('dt'=>1, 'dd'=>1),
         'dd'=>array('dd'=>1, 'dt'=>1),
         'dl'=>array('dd'=>1, 'dt'=>1),
         'p'=>array('p'=>1),
         'nobr'=>array('nobr'=>1),
         'b'=>array('b'=>1),
         'option'=>array('option'=>1),
     );

     function __construct($str=null, $lowercase=true, $forceTagsClosed=true, $target_charset=DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
     {
         if ($str)
         {
             if (preg_match("/^http:\/\//i",$str) || is_file($str))
             {
                 $this->load_file($str);
             }
             else
             {
                 $this->load($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);
             }
         }
         // Forcing tags to be closed implies that we don't trust the html, but it can lead to parsing errors if we SHOULD trust the html.
         if (!$forceTagsClosed) {
             $this->optional_closing_array=array();
         }
         $this->_target_charset = $target_charset;
     }

     function __destruct()
     {
         $this->clear();
     }

     // load html from string
     function load($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
     {
         global $debugObject;

         // prepare
         $this->prepare($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);
         // strip out comments
         $this->remove_noise("'<!--(.*?)-->'is");
         // strip out cdata
         $this->remove_noise("'<!\[CDATA\[(.*?)\]\]>'is", true);
         // Per sourceforge http://sourceforge.net/tracker/?func=detail&aid=2949097&group_id=218559&atid=1044037
         // Script tags removal now preceeds style tag removal.
         // strip out <script> tags
         $this->remove_noise("'<\s*script[^>]*[^/]>(.*?)<\s*/\s*script\s*>'is");
         $this->remove_noise("'<\s*script\s*>(.*?)<\s*/\s*script\s*>'is");
         // strip out <style> tags
         $this->remove_noise("'<\s*style[^>]*[^/]>(.*?)<\s*/\s*style\s*>'is");
         $this->remove_noise("'<\s*style\s*>(.*?)<\s*/\s*style\s*>'is");
         // strip out preformatted tags
         $this->remove_noise("'<\s*(?:code)[^>]*>(.*?)<\s*/\s*(?:code)\s*>'is");
         // strip out server side scripts
         $this->remove_noise("'(<\?)(.*?)(\?>)'s", true);
         // strip smarty scripts
         $this->remove_noise("'(\{\w)(.*?)(\})'s", true);

         // parsing
         while ($this->parse());
         // end
         $this->root->_[HDOM_INFO_END] = $this->cursor;
         $this->parse_charset();

         // make load function chainable
         return $this;

     }

     // load html from file
     function load_file()
     {
         $args = func_get_args();
         $this->load(call_user_func_array('file_get_contents', $args), true);
         // Throw an error if we can't properly load the dom.
         if (($error=error_get_last())!==null) {
             $this->clear();
             return false;
         }
     }

     // set callback function
     function set_callback($function_name)
     {
         $this->callback = $function_name;
     }

     // remove callback function
     function remove_callback()
     {
         $this->callback = null;
     }

     // save dom as string
     function save($filepath='')
     {
         $ret = $this->root->innertext();
         if ($filepath!=='') file_put_contents($filepath, $ret, LOCK_EX);
         return $ret;
     }

     // find dom node by css selector
     // Paperg - allow us to specify that we want case insensitive testing of the value of the selector.
     function find($selector, $idx=null, $lowercase=false)
     {
         return $this->root->find($selector, $idx, $lowercase);
     }

     // clean up memory due to php5 circular references memory leak...
     function clear()
     {
         foreach ($this->nodes as $n) {$n->clear(); $n = null;}
         // This add next line is documented in the sourceforge repository. 2977248 as a fix for ongoing memory leaks that occur even with the use of clear.
         if (isset($this->children)) foreach ($this->children as $n) {$n->clear(); $n = null;}
         if (isset($this->parent)) {$this->parent->clear(); unset($this->parent);}
         if (isset($this->root)) {$this->root->clear(); unset($this->root);}
         unset($this->doc);
         unset($this->noise);
     }

     function dump($show_attr=true)
     {
         $this->root->dump($show_attr);
     }

     // prepare HTML data and init everything
     protected function prepare($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
     {
         $this->clear();

         // set the length of content before we do anything to it.
         $this->size = strlen($str);
         // Save the original size of the html that we got in.  It might be useful to someone.
         $this->original_size = $this->size;

         //before we save the string as the doc...  strip out the \r \n's if we are told to.
         if ($stripRN) {
             $str = str_replace("\r", " ", $str);
             $str = str_replace("\n", " ", $str);

             // set the length of content since we have changed it.
             $this->size = strlen($str);
         }

         $this->doc = $str;
         $this->pos = 0;
         $this->cursor = 1;
         $this->noise = array();
         $this->nodes = array();
         $this->lowercase = $lowercase;
         $this->default_br_text = $defaultBRText;
         $this->default_span_text = $defaultSpanText;
         $this->root = new simple_html_dom_node($this);
         $this->root->tag = 'root';
         $this->root->_[HDOM_INFO_BEGIN] = -1;
         $this->root->nodetype = HDOM_TYPE_ROOT;
         $this->parent = $this->root;
         if ($this->size>0) $this->char = $this->doc[0];
     }

     // parse html content
     protected function parse()
     {
         if (($s = $this->copy_until_char('<'))==='')
         {
             return $this->read_tag();
         }

         // text
         $node = new simple_html_dom_node($this);
         ++$this->cursor;
         $node->_[HDOM_INFO_TEXT] = $s;
         $this->link_nodes($node, false);
         return true;
     }

     // PAPERG - dkchou - added this to try to identify the character set of the page we have just parsed so we know better how to spit it out later.
     // NOTE:  IF you provide a routine called get_last_retrieve_url_contents_content_type which returns the CURLINFO_CONTENT_TYPE from the last curl_exec
     // (or the content_type header from the last transfer), we will parse THAT, and if a charset is specified, we will use it over any other mechanism.
     protected function parse_charset()
     {
         global $debugObject;

         $charset = null;

         if (function_exists('get_last_retrieve_url_contents_content_type'))
         {
             $contentTypeHeader = get_last_retrieve_url_contents_content_type();
             $success = preg_match('/charset=(.+)/', $contentTypeHeader, $matches);
             if ($success)
             {
                 $charset = $matches[1];
                 if (is_object($debugObject)) {$debugObject->debugLog(2, 'header content-type found charset of: ' . $charset);}
             }

         }

         if (empty($charset))
         {
             $el = $this->root->find('meta[http-equiv=Content-Type]',0);
             if (!empty($el))
             {
                 $fullvalue = $el->content;
                 if (is_object($debugObject)) {$debugObject->debugLog(2, 'meta content-type tag found' . $fullvalue);}

                 if (!empty($fullvalue))
                 {
                     $success = preg_match('/charset=(.+)/', $fullvalue, $matches);
                     if ($success)
                     {
                         $charset = $matches[1];
                     }
                     else
                     {
                         // If there is a meta tag, and they don't specify the character set, research says that it's typically ISO-8859-1
                         if (is_object($debugObject)) {$debugObject->debugLog(2, 'meta content-type tag couldn\'t be parsed. using iso-8859 default.');}
                         $charset = 'ISO-8859-1';
                     }
                 }
             }
         }

         // If we couldn't find a charset above, then lets try to detect one based on the text we got...
         if (empty($charset))
         {
             // Have php try to detect the encoding from the text given to us.
             $charset = mb_detect_encoding($this->root->plaintext . "ascii", $encoding_list = array( "UTF-8", "CP1252" ) );
             if (is_object($debugObject)) {$debugObject->debugLog(2, 'mb_detect found: ' . $charset);}

             // and if this doesn't work...  then we need to just wrongheadedly assume it's UTF-8 so that we can move on - cause this will usually give us most of what we need...
             if ($charset === false)
             {
                 if (is_object($debugObject)) {$debugObject->debugLog(2, 'since mb_detect failed - using default of utf-8');}
                 $charset = 'UTF-8';
             }
         }

         // Since CP1252 is a superset, if we get one of it's subsets, we want it instead.
         if ((strtolower($charset) == strtolower('ISO-8859-1')) || (strtolower($charset) == strtolower('Latin1')) || (strtolower($charset) == strtolower('Latin-1')))
         {
             if (is_object($debugObject)) {$debugObject->debugLog(2, 'replacing ' . $charset . ' with CP1252 as its a superset');}
             $charset = 'CP1252';
         }

         if (is_object($debugObject)) {$debugObject->debugLog(1, 'EXIT - ' . $charset);}

         return $this->_charset = $charset;
     }

     // read tag info
     protected function read_tag()
     {
         if ($this->char!=='<')
         {
             $this->root->_[HDOM_INFO_END] = $this->cursor;
             return false;
         }
         $begin_tag_pos = $this->pos;
         $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next

         // end tag
         if ($this->char==='/')
         {
             $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
             // This represents the change in the simple_html_dom trunk from revision 180 to 181.
             // $this->skip($this->token_blank_t);
             $this->skip($this->token_blank);
             $tag = $this->copy_until_char('>');

             // skip attributes in end tag
             if (($pos = strpos($tag, ' '))!==false)
                 $tag = substr($tag, 0, $pos);

             $parent_lower = strtolower($this->parent->tag);
             $tag_lower = strtolower($tag);

             if ($parent_lower!==$tag_lower)
             {
                 if (isset($this->optional_closing_tags[$parent_lower]) && isset($this->block_tags[$tag_lower]))
                 {
                     $this->parent->_[HDOM_INFO_END] = 0;
                     $org_parent = $this->parent;

                     while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)
                         $this->parent = $this->parent->parent;

                     if (strtolower($this->parent->tag)!==$tag_lower) {
                         $this->parent = $org_parent; // restore origonal parent
                         if ($this->parent->parent) $this->parent = $this->parent->parent;
                         $this->parent->_[HDOM_INFO_END] = $this->cursor;
                         return $this->as_text_node($tag);
                     }
                 }
                 else if (($this->parent->parent) && isset($this->block_tags[$tag_lower]))
                 {
                     $this->parent->_[HDOM_INFO_END] = 0;
                     $org_parent = $this->parent;

                     while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)
                         $this->parent = $this->parent->parent;

                     if (strtolower($this->parent->tag)!==$tag_lower)
                     {
                         $this->parent = $org_parent; // restore origonal parent
                         $this->parent->_[HDOM_INFO_END] = $this->cursor;
                         return $this->as_text_node($tag);
                     }
                 }
                 else if (($this->parent->parent) && strtolower($this->parent->parent->tag)===$tag_lower)
                 {
                     $this->parent->_[HDOM_INFO_END] = 0;
                     $this->parent = $this->parent->parent;
                 }
                 else
                     return $this->as_text_node($tag);
             }

             $this->parent->_[HDOM_INFO_END] = $this->cursor;
             if ($this->parent->parent) $this->parent = $this->parent->parent;

             $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
             return true;
         }

         $node = new simple_html_dom_node($this);
         $node->_[HDOM_INFO_BEGIN] = $this->cursor;
         ++$this->cursor;
         $tag = $this->copy_until($this->token_slash);
         $node->tag_start = $begin_tag_pos;

         // doctype, cdata & comments...
         if (isset($tag[0]) && $tag[0]==='!') {
             $node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until_char('>');

             if (isset($tag[2]) && $tag[1]==='-' && $tag[2]==='-') {
                 $node->nodetype = HDOM_TYPE_COMMENT;
                 $node->tag = 'comment';
             } else {
                 $node->nodetype = HDOM_TYPE_UNKNOWN;
                 $node->tag = 'unknown';
             }
             if ($this->char==='>') $node->_[HDOM_INFO_TEXT].='>';
             $this->link_nodes($node, true);
             $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
             return true;
         }

         // text
         if ($pos=strpos($tag, '<')!==false) {
             $tag = '<' . substr($tag, 0, -1);
             $node->_[HDOM_INFO_TEXT] = $tag;
             $this->link_nodes($node, false);
             $this->char = $this->doc[--$this->pos]; // prev
             return true;
         }

         if (!preg_match("/^[\w-:]+$/", $tag)) {
             $node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until('<>');
             if ($this->char==='<') {
                 $this->link_nodes($node, false);
                 return true;
             }

             if ($this->char==='>') $node->_[HDOM_INFO_TEXT].='>';
             $this->link_nodes($node, false);
             $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
             return true;
         }

         // begin tag
         $node->nodetype = HDOM_TYPE_ELEMENT;
         $tag_lower = strtolower($tag);
         $node->tag = ($this->lowercase) ? $tag_lower : $tag;

         // handle optional closing tags
         if (isset($this->optional_closing_tags[$tag_lower]) )
         {
             while (isset($this->optional_closing_tags[$tag_lower][strtolower($this->parent->tag)]))
             {
                 $this->parent->_[HDOM_INFO_END] = 0;
                 $this->parent = $this->parent->parent;
             }
             $node->parent = $this->parent;
         }

         $guard = 0; // prevent infinity loop
         $space = array($this->copy_skip($this->token_blank), '', '');

         // attributes
         do
         {
             if ($this->char!==null && $space[0]==='')
             {
                 break;
             }
             $name = $this->copy_until($this->token_equal);
             if ($guard===$this->pos)
             {
                 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                 continue;
             }
             $guard = $this->pos;

             // handle endless '<'
             if ($this->pos>=$this->size-1 && $this->char!=='>') {
                 $node->nodetype = HDOM_TYPE_TEXT;
                 $node->_[HDOM_INFO_END] = 0;
                 $node->_[HDOM_INFO_TEXT] = '<'.$tag . $space[0] . $name;
                 $node->tag = 'text';
                 $this->link_nodes($node, false);
                 return true;
             }

             // handle mismatch '<'
             if ($this->doc[$this->pos-1]=='<') {
                 $node->nodetype = HDOM_TYPE_TEXT;
                 $node->tag = 'text';
                 $node->attr = array();
                 $node->_[HDOM_INFO_END] = 0;
                 $node->_[HDOM_INFO_TEXT] = substr($this->doc, $begin_tag_pos, $this->pos-$begin_tag_pos-1);
                 $this->pos -= 2;
                 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                 $this->link_nodes($node, false);
                 return true;
             }

             if ($name!=='/' && $name!=='') {
                 $space[1] = $this->copy_skip($this->token_blank);
                 $name = $this->restore_noise($name);
                 if ($this->lowercase) $name = strtolower($name);
                 if ($this->char==='=') {
                     $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                     $this->parse_attr($node, $name, $space);
                 }
                 else {
                     //no value attr: nowrap, checked selected...
                     $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;
                     $node->attr[$name] = true;
                     if ($this->char!='>') $this->char = $this->doc[--$this->pos]; // prev
                 }
                 $node->_[HDOM_INFO_SPACE][] = $space;
                 $space = array($this->copy_skip($this->token_blank), '', '');
             }
             else
                 break;
         } while ($this->char!=='>' && $this->char!=='/');

         $this->link_nodes($node, true);
         $node->_[HDOM_INFO_ENDSPACE] = $space[0];

         // check self closing
         if ($this->copy_until_char_escape('>')==='/')
         {
             $node->_[HDOM_INFO_ENDSPACE] .= '/';
             $node->_[HDOM_INFO_END] = 0;
         }
         else
         {
             // reset parent
             if (!isset($this->self_closing_tags[strtolower($node->tag)])) $this->parent = $node;
         }
         $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next

         // If it's a BR tag, we need to set it's text to the default text.
         // This way when we see it in plaintext, we can generate formatting that the user wants.
         // since a br tag never has sub nodes, this works well.
         if ($node->tag == "br")
         {
             $node->_[HDOM_INFO_INNER] = $this->default_br_text;
         }

         return true;
     }

     // parse attributes
     protected function parse_attr($node, $name, &$space)
     {
         // Per sourceforge: http://sourceforge.net/tracker/?func=detail&aid=3061408&group_id=218559&atid=1044037
         // If the attribute is already defined inside a tag, only pay atetntion to the first one as opposed to the last one.
         if (isset($node->attr[$name]))
         {
             return;
         }

         $space[2] = $this->copy_skip($this->token_blank);
         switch ($this->char) {
             case '"':
                 $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
                 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                 $node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('"'));
                 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                 break;
             case '\'':
                 $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_SINGLE;
                 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                 $node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('\''));
                 $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
                 break;
             default:
                 $node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;
                 $node->attr[$name] = $this->restore_noise($this->copy_until($this->token_attr));
         }
         // PaperG: Attributes should not have \r or \n in them, that counts as html whitespace.
         $node->attr[$name] = str_replace("\r", "", $node->attr[$name]);
         $node->attr[$name] = str_replace("\n", "", $node->attr[$name]);
         // PaperG: If this is a "class" selector, lets get rid of the preceeding and trailing space since some people leave it in the multi class case.
         if ($name == "class") {
             $node->attr[$name] = trim($node->attr[$name]);
         }
     }

     // link node's parent
     protected function link_nodes(&$node, $is_child)
     {
         $node->parent = $this->parent;
         $this->parent->nodes[] = $node;
         if ($is_child)
         {
             $this->parent->children[] = $node;
         }
     }

     // as a text node
     protected function as_text_node($tag)
     {
         $node = new simple_html_dom_node($this);
         ++$this->cursor;
         $node->_[HDOM_INFO_TEXT] = '</' . $tag . '>';
         $this->link_nodes($node, false);
         $this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
         return true;
     }

     protected function skip($chars)
     {
         $this->pos += strspn($this->doc, $chars, $this->pos);
         $this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
     }

     protected function copy_skip($chars)
     {
         $pos = $this->pos;
         $len = strspn($this->doc, $chars, $pos);
         $this->pos += $len;
         $this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
         if ($len===0) return '';
         return substr($this->doc, $pos, $len);
     }

     protected function copy_until($chars)
     {
         $pos = $this->pos;
         $len = strcspn($this->doc, $chars, $pos);
         $this->pos += $len;
         $this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
         return substr($this->doc, $pos, $len);
     }

     protected function copy_until_char($char)
     {
         if ($this->char===null) return '';

         if (($pos = strpos($this->doc, $char, $this->pos))===false) {
             $ret = substr($this->doc, $this->pos, $this->size-$this->pos);
             $this->char = null;
             $this->pos = $this->size;
             return $ret;
         }

         if ($pos===$this->pos) return '';
         $pos_old = $this->pos;
         $this->char = $this->doc[$pos];
         $this->pos = $pos;
         return substr($this->doc, $pos_old, $pos-$pos_old);
     }

     protected function copy_until_char_escape($char)
     {
         if ($this->char===null) return '';

         $start = $this->pos;
         while (1)
         {
             if (($pos = strpos($this->doc, $char, $start))===false)
             {
                 $ret = substr($this->doc, $this->pos, $this->size-$this->pos);
                 $this->char = null;
                 $this->pos = $this->size;
                 return $ret;
             }

             if ($pos===$this->pos) return '';

             if ($this->doc[$pos-1]==='\\') {
                 $start = $pos+1;
                 continue;
             }

             $pos_old = $this->pos;
             $this->char = $this->doc[$pos];
             $this->pos = $pos;
             return substr($this->doc, $pos_old, $pos-$pos_old);
         }
     }

     // remove noise from html content
     // save the noise in the $this->noise array.
     protected function remove_noise($pattern, $remove_tag=false)
     {
         global $debugObject;
         if (is_object($debugObject)) { $debugObject->debugLogEntry(1); }

         $count = preg_match_all($pattern, $this->doc, $matches, PREG_SET_ORDER|PREG_OFFSET_CAPTURE);

         for ($i=$count-1; $i>-1; --$i)
         {
             $key = '___noise___'.sprintf('% 5d', count($this->noise)+1000);
             if (is_object($debugObject)) { $debugObject->debugLog(2, 'key is: ' . $key); }
             $idx = ($remove_tag) ? 0 : 1;
             $this->noise[$key] = $matches[$i][$idx][0];
             $this->doc = substr_replace($this->doc, $key, $matches[$i][$idx][1], strlen($matches[$i][$idx][0]));
         }

         // reset the length of content
         $this->size = strlen($this->doc);
         if ($this->size>0)
         {
             $this->char = $this->doc[0];
         }
     }

     // restore noise to html content
     function restore_noise($text)
     {
         global $debugObject;
         if (is_object($debugObject)) { $debugObject->debugLogEntry(1); }

         while (($pos=strpos($text, '___noise___'))!==false)
         {
             // Sometimes there is a broken piece of markup, and we don't GET the pos+11 etc... token which indicates a problem outside of us...
             if (strlen($text) > $pos+15)
             {
                 $key = '___noise___'.$text[$pos+11].$text[$pos+12].$text[$pos+13].$text[$pos+14].$text[$pos+15];
                 if (is_object($debugObject)) { $debugObject->debugLog(2, 'located key of: ' . $key); }

                 if (isset($this->noise[$key]))
                 {
                     $text = substr($text, 0, $pos).$this->noise[$key].substr($text, $pos+16);
                 }
                 else
                 {
                     // do this to prevent an infinite loop.
                     $text = substr($text, 0, $pos).'UNDEFINED NOISE FOR KEY: '.$key . substr($text, $pos+16);
                 }
             }
             else
             {
                 // There is no valid key being given back to us... We must get rid of the ___noise___ or we will have a problem.
                 $text = substr($text, 0, $pos).'NO NUMERIC NOISE KEY' . substr($text, $pos+11);
             }
         }
         return $text;
     }

     // Sometimes we NEED one of the noise elements.
     function search_noise($text)
     {
         global $debugObject;
         if (is_object($debugObject)) { $debugObject->debugLogEntry(1); }

         foreach($this->noise as $noiseElement)
         {
             if (strpos($noiseElement, $text)!==false)
             {
                 return $noiseElement;
             }
         }
     }
     function __toString()
     {
         return $this->root->innertext();
     }

     function __get($name)
     {
         switch ($name)
         {
             case 'outertext':
                 return $this->root->innertext();
             case 'innertext':
                 return $this->root->innertext();
             case 'plaintext':
                 return $this->root->text();
             case 'charset':
                 return $this->_charset;
             case 'target_charset':
                 return $this->_target_charset;
         }
     }

     // camel naming conventions
     function childNodes($idx=-1) {return $this->root->childNodes($idx);}
     function firstChild() {return $this->root->first_child();}
     function lastChild() {return $this->root->last_child();}
     function createElement($name, $value=null) {return @str_get_html("<$name>$value</$name>")->first_child();}
     function createTextNode($value) {return @end(str_get_html($value)->nodes);}
     function getElementById($id) {return $this->find("#$id", 0);}
     function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}
     function getElementByTagName($name) {return $this->find($name, 0);}
     function getElementsByTagName($name, $idx=-1) {return $this->find($name, $idx);}
     function loadFile() {$args = func_get_args();$this->load_file($args);}
 }

 ?>

3：创建抓包代码 test.php,代码如下：

 <?php
     //error_reporting(0);
     set_time_limit(0);
     include_once 'simple_html_dom.php';
     echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
     //$data = '#在抖音，记录美好生活#【库存】抛个硬币 如果摔碎了 今天我就不吃饭了 #校园生活  #大学 https://v.douyin.com/p9taJa/ 复制此链接，打开【抖音短视频】，直接观看视频！';
     $data = '#科比 愿你去的地方也有篮球陪伴，也能披着24号紫金战衣！ #动态壁纸 https://v.douyin.com/36xkCS/ 复制此链接，打开【抖音短视频】，直接观看视频！';
     $data = getData($data);
     echo json_encode($data);

     function getData($data){
         $url = getUrl($data);
         $cookie_jar = dirname(__FILE__).'/tmp.txt';//tempnam('./tmp','cookie');
         $data = get_content($url, $cookie_jar);

         $page = str_get_html($data);

         $data = array(
                 'base'=>array(
                     'headimg'=>false, // 头像
                     'name'=>false, // 昵称
                     'title'=>false, // 标题（姑且叫标题吧）
                     'description'=>false // 描述
                 ),
                 'video'=>array(
                     'cover'=>false, // 封面
                     'src'=>false, // 路径
                     'width'=>false, // 宽度
                     'height'=>false // 高度
                 )
             );
         $user = $page->find('div[class=user-info]');
         // 头像、 昵称
         if(count($user) > 0){
             $img = $user[0]->find('div[class=avatar]');
             if(count($img) > 0){
                 $img = $img[0]->find('img');
                 if(count($img) > 0){
                     // 头像
                     $data['base']['headimg'] = $img[0]->src;
                     // 昵称
                     $data['base']['name'] = $img[0]->alt;
                 }
             }
         }
         // 标题、描述
         $title = $page->find('div[class=challenge-info]');
         if(count($title) > 0){
             $description = $title[0]->next_sibling();
             $title = $title[0]->first_child()->first_child();
             $data['base']['title'] = $title->innertext;
             $data['base']['description'] = $description->innertext;
         }
         $video = $page->find('div[id=pageletReflowVideo]');
         if(count($video) > 0){
             $script = $video[0]->next_sibling();
             if(!empty($script)){
                 $script = $script->next_sibling();
                 if(!empty($script)){
                     $script = $script->next_sibling()->innertext;
                     $data['video'] = getVideo($script);
                 }
             }

         }
         return $data;
     }

     function getVideo($scripts){
         $video = array();
         $scripts = preg_replace('/\s+/','',$scripts);
         // 宽度
         preg_match('/videoWidth:([0-9.]*),/' , $scripts, $matches);
         if(empty($matches) || count($matches) < 2){
             $video['width'] = false;
         }else{
             $video['width'] = $matches[1];
         }
         // 高度
         preg_match('/videoHeight:([0-9.]*),/' , $scripts, $matches);
         if(empty($matches) || count($matches) < 2){
             $video['height'] = false;
         }else{
             $video['height'] = $matches[1];
         }
         // 视频路径
         preg_match('/playAddr:"(.*)",/' , $scripts, $matches);
         if(empty($matches) || count($matches) < 2){
             $video['src'] = false;
         }else{
             $video['src'] = $matches[1];
         }
         // 封面
         preg_match('/cover:"(.*)"}/' , $scripts, $matches);
         if(empty($matches) || count($matches) < 2){
             $video['cover'] = false;
         }else{
             $video['cover'] = $matches[1];
         }
         return $video;
     }
     function get_content($url, $cookie,$referfer='') {
     //var_dump($post);exit;
     $useragent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
     /*if ($curl_loops++ >= $curl_max_loops) {
         $curl_loops = 0;
         return false;
     }*/
     if($referfer == ''){
         $referfer = 'https://www.kujiale.com/';
     }
     $header = array("Referer: ".$referfer);
       $curl = curl_init();//初始化curl模块
       curl_setopt($curl, CURLOPT_URL, $url);//登录提交的地址
       curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); //不验证证书
       curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false); //不验证证书
       curl_setopt($curl, CURLOPT_HEADER, 1);//是否显示头信息
       curl_setopt($curl, CURLOPT_HTTPHEADER,$header);
       //curl_setopt ($curl,CURLOPT_REFERER,'http://www.kujiale.com/');
       curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//是否自动显示返回的信息
       curl_setopt($curl, CURLOPT_COOKIEFILE, $cookie); //设置Cookie信息保存在指定的文件中
       curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie); //设置Cookie信息保存在指定的文件中
       //curl_setopt($curl, CURLOPT_POST, 1);//post方式提交
       //curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($post));//要提交的信息
       //curl_setopt($curl,CURLOPT_POSTFIELDS,$post);

       curl_setopt($curl, CURLOPT_USERAGENT, $useragent);
       //curl_setopt($curl, CURLOPT_REFERER, 'http://www.kujiale.com/');
       $data = curl_exec($curl);//执行cURL
       $ret = $data;
       list($header, $data) = explode("\r\n\r\n", $data, 2);
       $http_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
       $last_url = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL);
       //var_dump($last_url);
       //$httpCode = curl_getinfo($curl,CURLINFO_HTTP_CODE);
       //var_dump($httpCode);
       //echo '<hr/>';
       curl_close($curl);//关闭cURL资源，并且释放系统资源
       if ($http_code == 301 || $http_code == 302) {
             $matches = array();
             preg_match('/Location:(.*?)\n/', $header, $matches);
             $url = @parse_url(trim(array_pop($matches)));
             if (!$url) {
                   $curl_loops = 0;
                   return $data;
             }
             $new_url = $url['scheme'] . '://' . $url['host'] . $url['path']
                   . (isset($url['query']) ? '?' . $url['query'] : '');
             $new_url = stripslashes($new_url);
             return get_content($new_url,$cookie);
      } else {
           $curl_loops = 0;
           list($header, $data) = explode("\r\n\r\n", $ret, 2);
           return $data;
      }
 }
     function getUrl($data){
         preg_match('/https:\/\/v.douyin.com\/.*\//' , $data, $matches);
         if(empty($matches) || count($matches) != 1){
             return false;
         }else{
             return $matches[0];
         }
     }
 ?>

　将test.php中的$data 换成自己复制出来的链接就可以了。返回的是json格式的内容，可以直接渲染在前台 也可以存到数据库里面。

到此 从抖音上抓包视频内容就完成了，写的不好，请大家勿喷。大家有什么意见，欢迎在评论区留言。我看到了会回复大家 ，谢谢。