10个PHP代码片段
还记得CSDN研发频道此前发表过的一篇《可以直接拿来用的15个jQuery代码片段》吗?本文笔者将继续为你奉上10个超级有用的PHP代码片段。
PHP是一种HTML内嵌式的语言,是一种在服务器端执行的嵌入HTML文档的脚本语言。PHP拥有数以百计的基本功能,支持上千种扩展。这些功能都被很好的加载在PHP站点上,但内置的库有各种各样的命名。在PHP代码库中包含了无数个有用的PHP代码片段,每位开发者都需要不断完善自己的“工具箱”。有了这些代码片段可以为你节省大量的时间,一起来看下。
1.查找Longitudes与Latitudes之间的距离
- function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) {
- $theta = $longitude1 - $longitude2;
- $miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));
- $miles = acos($miles);
- $miles = rad2deg($miles);
- $miles = $miles * 60 * 1.1515;
- $feet = $miles * 5280;
- $yards = $feet / 3;
- $kilometers = $miles * 1.609344;
- $meters = $kilometers * 1000;
- return compact('miles','feet','yards','kilometers','meters');
- }
- $point1 = array('lat' => 40.770623, 'long' => -73.964367);
- $point2 = array('lat' => 40.758224, 'long' => -73.917404);
- $distance = getDistanceBetweenPointsNew($point1['lat'], $point1['long'], $point2['lat'], $point2['long']);
- foreach ($distance as $unit => $value) {
- echo $unit.': '.number_format($value,4).'
- ';
- }
- The example returns the following:
- miles: 2.6025
- feet: 13,741.4350
- yards: 4,580.4783
- kilometers: 4.1884
- meters: 4,188.3894
2.完善cURL功能
- function xcurl($url,$ref=null,$post=array(),$ua="Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre",$print=false) {
- $ch = curl_init();
- curl_setopt($ch, CURLOPT_AUTOREFERER, true);
- if(!empty($ref)) {
- curl_setopt($ch, CURLOPT_REFERER, $ref);
- }
- curl_setopt($ch, CURLOPT_URL, $url);
- curl_setopt($ch, CURLOPT_HEADER, 0);
- curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- if(!empty($ua)) {
- curl_setopt($ch, CURLOPT_USERAGENT, $ua);
- }
- if(count($post) > 0){
- curl_setopt($ch, CURLOPT_POST, 1);
- curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
- }
- $output = curl_exec($ch);
- curl_close($ch);
- if($print) {
- print($output);
- } else {
- return $output;
- }
- }
3.清理用户输入
- ]*?>.*?@si', // Strip out javascript
- '@<[\/\!]*?[^<>]*?>@si', // Strip out HTML tags
- '@]*?>.*?@siU', // Strip style tags properly
- '@@' // Strip multi-line comments
- );
- $output = preg_replace($search, '', $input);
- return $output;
- }
- ?>
- $val) {
- $output[$var] = sanitize($val);
- }
- }
- else {
- if (get_magic_quotes_gpc()) {
- $input = stripslashes($input);
- }
- $input = cleanInput($input);
- $output = mysql_real_escape_string($input);
- }
- return $output;
- }
- ?>
4.通过IP(城市、国家)检测地理位置
- function detect_city($ip) {
- $default = 'Hollywood, CA';
- if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost') $ip = '8.8.8.8'; $curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)'; $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip); $ch = curl_init(); $curl_opt = array( CURLOPT_FOLLOWLOCATION => 1,
- CURLOPT_HEADER => 0,
- CURLOPT_RETURNTRANSFER => 1,
- CURLOPT_USERAGENT => $curlopt_useragent,
- CURLOPT_URL => $url,
- CURLOPT_TIMEOUT => 1,
- CURLOPT_REFERER => 'http://' . $_SERVER['HTTP_HOST'],
- );
- curl_setopt_array($ch, $curl_opt);
- $content = curl_exec($ch);
- if (!is_null($curl_info)) {
- $curl_info = curl_getinfo($ch);
- }
- curl_close($ch);
- if ( preg_match('{
- City : ([^<]*)
- }i', $content, $regs) ) { $city = $regs[1]; } if ( preg_match('{
- State/Province : ([^<]*)
- }i', $content, $regs) ) { $state = $regs[1]; } if( $city!='' && $state!='' ){ $location = $city . ', ' . $state; return $location; }else{ return $default; } }
5.设置密码强度
- 100){
- $strength = 100;
- }
- return $strength;
- }
- var_dump(password_strength("Correct Horse Battery Staple"));
- echo "
- ";
- var_dump(password_strength("Super Monkey Ball"));
- echo "
- ";
- var_dump(password_strength("Tr0ub4dor&3"));
- echo "
- ";
- var_dump(password_strength("abc123"));
- echo "
- ";
- var_dump(password_strength("sweet"));
6.检测浏览器语言,只提供可用的$availableLanguages作为数组(‘en’, ‘de’, ‘es’)
- function get_client_language($availableLanguages, $default='en'){
- if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
- $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
- //start going through each one
- foreach ($langs as $value){
- $choice=substr($value,0,2);
- if(in_array($choice, $availableLanguages)){
- return $choice;
- }
- }
- }
- return $default;
- }
7.创建数据URL
- function data_uri($file, $mime) {
- $contents=file_get_contents($file);
- $base64=base64_encode($contents);
- echo "data:$mime;base64,$base64";
- }
8.创建更加友好的页面标题SEO URL
输入示例:$title = “This foo’s bar is rockin’ cool!”; echo makeseoname($title); //RETURNS: //this-foos-bar-is-rockin-cool
- function make_seo_name($title) {
- return preg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title))));
- }
9.终极加密功能
- // f(ucking) u(ncrackable) e(ncryption) function by BlackHatDBL (www.netforme.net)
- function fue($hash,$times) {
- // Execute the encryption(s) as many times as the user wants
- for($i=$times;$i>0;$i--) {
- // Encode with base64...
- $hash=base64_encode($hash);
- // and md5...
- $hash=md5($hash);
- // sha1...
- $hash=sha1($hash);
- // sha256... (one more)
- $hash=hash("sha256", $hash);
- // sha512
- $hash=hash("sha512", $hash);
- }
- // Finaly, when done, return the value
- return $hash;
- }
10a.Tweeter Feed Runner——使用任意twitter名,可在任意页面上加载用户资源。
- pversion;
- }
- public function loadTimeline($user, $max = 20){
- $this->twitURL .= 'statuses/user_timeline.xml?screen_name='.$user.'&count='.$max;
- $ch = curl_init();
- curl_setopt($ch, CURLOPT_URL, $this->twitURL);
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
- $this->xml = curl_exec($ch);
- return $this;
- }
- public function getTweets(){
- $this->twitterArr = $this->getTimelineArray();
- $tweets = array();
- foreach($this->twitterArr->status as $status){
- $tweets[$status->created_at->__toString()] = $status->text->__toString();
- }
- return $tweets;
- }
- public function getTimelineArray(){
- return simplexml_load_string($this->xml);
- }
- public function formatTweet($tweet){
- $tweet = preg_replace("/(http(.+?))( |$)/","$1$3", $tweet);
- $tweet = preg_replace("/#(.+?)(\h|\W|$)/", "#$1$2", $tweet);
- $tweet = preg_replace("/@(.+?)(\h|\W|$)/", "@$1$2", $tweet);
- return $tweet;
- }
- }
10b. Tweeter Feed Runner——用于在主题中创建文件,比如:example.php
- loadTimeline("phpsnips")->getTweets();
- foreach($feed as $time => $message){
- echo "<div class='tweet'>".$twitter->formatTweet($message)."<br />At: ".$time."</div>";
- }
每位程序员和开发者都喜欢讨论他们最爱的代码片段,尤其是当PHP开发者花费数个小时为网页编码或创建应用时,他们更知道这些代码的重要性。为了节约编码时间,笔者收集了一些较为实用的代码片段,帮助开发者提高工作效率。>>>点击查看PHP代码片段(一)
1) Whois query using PHP ——利用PHP获取Whois请求
利用这段代码,在特定的域名里可获得whois信息。把域名名称作为参数,并显示所有域名的相关信息。
- function whois_query($domain) {
- // fix the domain name:
- $domain = strtolower(trim($domain));
- $domain = preg_replace('/^http:\/\//i', '', $domain);
- $domain = preg_replace('/^www\./i', '', $domain);
- $domain = explode('/', $domain);
- $domain = trim($domain[0]);
- // split the TLD from domain name
- $_domain = explode('.', $domain);
- $lst = count($_domain)-1;
- $ext = $_domain[$lst];
- // You find resources and lists
- // like these on wikipedia:
- //
- // <a href="http://de.wikipedia.org/wiki/Whois">http://de.wikipedia.org/wiki/Whois</a>
- //
- $servers = array(
- "biz" => "whois.neulevel.biz",
- "com" => "whois.internic.net",
- "us" => "whois.nic.us",
- "coop" => "whois.nic.coop",
- "info" => "whois.nic.info",
- "name" => "whois.nic.name",
- "net" => "whois.internic.net",
- "gov" => "whois.nic.gov",
- "edu" => "whois.internic.net",
- "mil" => "rs.internic.net",
- "int" => "whois.iana.org",
- "ac" => "whois.nic.ac",
- "ae" => "whois.uaenic.ae",
- "at" => "whois.ripe.net",
- "au" => "whois.aunic.net",
- "be" => "whois.dns.be",
- "bg" => "whois.ripe.net",
- "br" => "whois.registro.br",
- "bz" => "whois.belizenic.bz",
- "ca" => "whois.cira.ca",
- "cc" => "whois.nic.cc",
- "ch" => "whois.nic.ch",
- "cl" => "whois.nic.cl",
- "cn" => "whois.cnnic.net.cn",
- "cz" => "whois.nic.cz",
- "de" => "whois.nic.de",
- "fr" => "whois.nic.fr",
- "hu" => "whois.nic.hu",
- "ie" => "whois.domainregistry.ie",
- "il" => "whois.isoc.org.il",
- "in" => "whois.ncst.ernet.in",
- "ir" => "whois.nic.ir",
- "mc" => "whois.ripe.net",
- "to" => "whois.tonic.to",
- "tv" => "whois.tv",
- "ru" => "whois.ripn.net",
- "org" => "whois.pir.org",
- "aero" => "whois.information.aero",
- "nl" => "whois.domain-registry.nl"
- );
- if (!isset($servers[$ext])){
- die('Error: No matching nic server found!');
- }
- $nic_server = $servers[$ext];
- $output = '';
- // connect to whois server:
- if ($conn = fsockopen ($nic_server, 43)) {
- fputs($conn, $domain."\r\n");
- while(!feof($conn)) {
- $output .= fgets($conn,128);
- }
- fclose($conn);
- }
- else { die('Error: Could not connect to ' . $nic_server . '!'); }
- return $output;
- }
2) Text messaging with PHP using the TextMagic API ——使用TextMagic API 获取PHP Test信息
TextMagic引入强大的核心API,可轻松将SMS发送到手机。该API是需要付费。
- the TextMagic PHP lib
- require('textmagic-sms-api-php/TextMagicAPI.php');
- // Set the username and password information
- $username = 'myusername';
- $password = 'mypassword';
- // Create a new instance of TM
- $router = new TextMagicAPI(array(
- 'username' => $username,
- 'password' => $password
- ));
- // Send a text message to '999-123-4567'
- $result = $router->send('Wake up!', array(9991234567), true);
- // result: Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 )
3) Get info about your memory usage——获取内存使用率
这段代码帮助你获取内存使用率。
- echo "Initial: ".memory_get_usage()." bytes \n";
- /* prints
- Initial: 361400 bytes
- */
- // let's use up some memory
- for ($i = 0; $i < 100000; $i++) {
- $array []= md5($i);
- }
- // let's remove half of the array
- for ($i = 0; $i < 100000; $i++) {
- unset($array[$i]);
- }
- echo "Final: ".memory_get_usage()." bytes \n";
- /* prints
- Final: 885912 bytes
- */
- echo "Peak: ".memory_get_peak_usage()." bytes \n";
- /* prints
- Peak: 13687072 bytes
- */
4) Display source code of any webpage——查看任意网页源代码
如果你想查看网页源代码,那么只需更改第二行的URL,源代码就会在网页上显示出。
- <?php // display source code $lines = file('http://google.com/'); foreach ($lines as $line_num => $line) {
- // loop thru each line and prepend line numbers
- echo "Line #{$line_num} : " . htmlspecialchars($line) . "
- \n";
- }
5) Create data uri’s——创建数据uri
通过使用此代码,你可以创建数据Uri,这对在HTML/CSS中嵌入图片非常有用,可帮助节省HTTP请求。
- function data_uri($file, $mime) {
- $contents=file_get_contents($file);
- $base64=base64_encode($contents);
- echo "data:$mime;base64,$base64";
- }
6) Detect location by IP——通过IP检索出地理位置
这段代码帮助你查找特定的IP,只需在功能参数上输入IP,就可检测出位置。
- function detect_city($ip) {
- $default = 'UNKNOWN';
- if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost') $ip = '8.8.8.8'; $curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)'; $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip); $ch = curl_init(); $curl_opt = array( CURLOPT_FOLLOWLOCATION => 1,
- CURLOPT_HEADER => 0,
- CURLOPT_RETURNTRANSFER => 1,
- CURLOPT_USERAGENT => $curlopt_useragent,
- CURLOPT_URL => $url,
- CURLOPT_TIMEOUT => 1,
- CURLOPT_REFERER => 'http://' . $_SERVER['HTTP_HOST'],
- );
- curl_setopt_array($ch, $curl_opt);
- $content = curl_exec($ch);
- if (!is_null($curl_info)) {
- $curl_info = curl_getinfo($ch);
- }
- curl_close($ch);
- if ( preg_match('{
- City : ([^<]*)
- }i’, $content, $regs) ) { $city = $regs[1]; } if ( preg_match(‘{
- State/Province : ([^<]*)
- }i’, $content, $regs) ) { $state = $regs[1]; } if( $city!=” && $state!=” ){ $location = $city . ‘, ‘ . $state; return $location; }else{ return $default; } }
7) Detect browser language——查看浏览器语言
检测浏览器使用的代码脚本语言。
- function get_client_language($availableLanguages, $default='en'){
- if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
- $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
- foreach ($langs as $value){
- $choice=substr($value,0,2);
- if(in_array($choice, $availableLanguages)){
- return $choice;
- }
- }
- }
- return $default;
- }
8) Check if server is HTTPS——检测服务器是否是HTTPS
- if ($_SERVER['HTTPS'] != "on") {
- echo "This is not HTTPS";
- }else{
- echo "This is HTTPS";
- }
9) Generate CSV file from a PHP array——在PHP数组中生成.csv 文件
- function generateCsv($data, $delimiter = ',', $enclosure = '"') {
- $handle = fopen('php://temp', 'r+');
- foreach ($data as $line) {
- fputcsv($handle, $line, $delimiter, $enclosure);
- }
- rewind($handle);
- while (!feof($handle)) {
- $contents .= fread($handle, 8192);
- }
- fclose($handle);
- return $contents;
- }
jQuery里提供了许多创建交互式网站的方法,在开发Web项目时,开发人员应该好好利用jQuery代码,它们不仅能给网站带来各种动画、特效,还会提高网站的用户体验。
本文收集了15段非常实用的jQuery代码片段,你可以直接复制黏贴到代码里,但请开发者注意了,要理解代码再使用哦。下面就让我们一起来享受jQuery代码的魅力之处吧。
1.预加载图片
- (function($) {
- var cache = [];
- // Arguments are image paths relative to the current page.
- $.preLoadImages = function() {
- var args_len = arguments.length;
- for (var i = args_len; i--;) {
- var cacheImage = document.createElement('img');
- cacheImage.src = arguments[i];
- cache.push(cacheImage);
- }
- }
- jQuery.preLoadImages("image1.gif", "/path/to/image2.png");
2. 让页面中的每个元素都适合在移动设备上展示
- var scr = document.createElement('script');
- scr.setAttribute('src', 'https://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js');
- document.body.appendChild(scr);
- scr.onload = function(){
- $('div').attr('class', '').attr('id', '').css({
- 'margin' : 0,
- 'padding' : 0,
- 'width': '100%',
- 'clear':'both'
- });
- };
3.图像等比例缩放
- $(window).bind("load", function() {
- // IMAGE RESIZE
- $('#product_cat_list img').each(function() {
- var maxWidth = 120;
- var maxHeight = 120;
- var ratio = 0;
- var width = $(this).width();
- var height = $(this).height();
- if(width > maxWidth){
- ratio = maxWidth / width;
- $(this).css("width", maxWidth);
- $(this).css("height", height * ratio);
- height = height * ratio;
- }
- var width = $(this).width();
- var height = $(this).height();
- if(height > maxHeight){
- ratio = maxHeight / height;
- $(this).css("height", maxHeight);
- $(this).css("width", width * ratio);
- width = width * ratio;
- }
- });
- //$("#contentpage img").show();
- // IMAGE RESIZE
- });
4.返回页面顶部
- // Back To Top
- $(document).ready(function(){
- $('.top').click(function() {
- $(document).scrollTo(0,500);
- });
- });
- //Create a link defined with the class .top
- <a href="#" class="top">Back To Top</a>
5.使用jQuery打造手风琴式的折叠效果
- var accordion = {
- init: function(){
- var $container = $('#accordion');
- $container.find('li:not(:first) .details').hide();
- $container.find('li:first').addClass('active');
- $container.on('click','li a',function(e){
- e.preventDefault();
- var $this = $(this).parents('li');
- if($this.hasClass('active')){
- if($('.details').is(':visible')) {
- $this.find('.details').slideUp();
- } else {
- $this.find('.details').slideDown();
- }
- } else {
- $container.find('li.active .details').slideUp();
- $container.find('li').removeClass('active');
- $this.addClass('active');
- $this.find('.details').slideDown();
- }
- });
- }
- };
6.通过预加载图片廊中的上一幅下一幅图片来模仿Facebook的图片展示方式
- var nextimage = "/images/some-image.jpg";
- $(document).ready(function(){
- window.setTimeout(function(){
- var img = $("").attr("src", nextimage).load(function(){
- //all done
- });
- }, 100);
- });
7.使用jQuery和Ajax自动填充选择框
- $(function(){
- $("select#ctlJob").change(function(){
- $.getJSON("/select.php",{id: $(this).val(), ajax: 'true'}, function(j){
- var options = '';
- for (var i = 0; i < j.length; i++) {
- options += '
- ' + j[i].optionDisplay + '
- ';
- }
- $("select#ctlPerson").html(options);
- })
- })
- })
8.自动替换丢失的图片
- // Safe Snippet
- $("img").error(function () {
- $(this).unbind("error").attr("src", "missing_image.gif");
- });
- // Persistent Snipper
- $("img").error(function () {
- $(this).attr("src", "missing_image.gif");
- });
9.在鼠标悬停时显示淡入/淡出特效
- $(document).ready(function(){
- $(".thumbs img").fadeTo("slow", 0.6); // This sets the opacity of the thumbs to fade down to 60% when the page loads
- $(".thumbs img").hover(function(){
- $(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover
- },function(){
- $(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout
- });
- });
10.清空表单数据
- function clearForm(form) {
- // iterate over all of the inputs for the form
- // element that was passed in
- $(':input', form).each(function() {
- var type = this.type;
- var tag = this.tagName.toLowerCase(); // normalize case
- // it's ok to reset the value attr of text inputs,
- // password inputs, and textareas
- if (type == 'text' || type == 'password' || tag == 'textarea')
- this.value = "";
- // checkboxes and radios need to have their checked state cleared
- // but should *not* have their 'value' changed
- else if (type == 'checkbox' || type == 'radio')
- this.checked = false;
- // select elements need to have their 'selectedIndex' property set to -1
- // (this works for both single and multiple select elements)
- else if (tag == 'select')
- this.selectedIndex = -1;
- });
- };
11.预防对表单进行多次提交
- $(document).ready(function() {
- $('form').submit(function() {
- if(typeof jQuery.data(this, "disabledOnSubmit") == 'undefined') {
- jQuery.data(this, "disabledOnSubmit", { submited: true });
- $('input[type=submit], input[type=button]', this).each(function() {
- $(this).attr("disabled", "disabled");
- });
- return true;
- }
- else
- {
- return false;
- }
- });
- });
12.动态添加表单元素
- //change event on password1 field to prompt new input
- $('#password1').change(function() {
- //dynamically create new input and insert after password1
- $("#password1").append("");
- });
13.让整个Div可点击
- blah blah blah. link
- The following lines of jQuery will make the entire div clickable: $(".myBox").click(function(){ window.location=$(this).find("a").attr("href"); return false; });
14.平衡高度或Div元素
- var maxHeight = 0;
- $("div").each(function(){
- if ($(this).height() > maxHeight) { maxHeight = $(this).height(); }
- });
- $("div").height(maxHeight);
15. 在窗口滚动时自动加载内容
- var loading = false;
- $(window).scroll(function(){
- if((($(window).scrollTop()+$(window).height())+250)>=$(document).height()){
- if(loading == false){
- loading = true;
- $('#loadingbar').css("display","block");
- $.get("load.php?start="+$('#loaded_max').val(), function(loaded){
- $('body').append(loaded);
- $('#loaded_max').val(parseInt($('#loaded_max').val())+50);
- $('#loadingbar').css("display","none");
- loading = false;
- });
- }
- }
- });
- $(document).ready(function() {
- $('#loaded_max').val(50);
- });
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