CentOS下用yum配置php+mysql+apache（LAMP）

#安装需要的包，有依赖关系，自动帮你解决
yum install httpd mysql mysql-server php php-gd php-mbstring php-mysql

#启动httpd
service httpd start
#设为开机启动
chkconfig httpd on

#启动mysqld
service mysqld start
#设为开机启动
chkconfig mysqld on

#在根目录下创建一个测试文件，写个phpinfo函数
vi /var/www/html/phpinfo.php

打开浏览器，输入http://ip/phpinfo.php，就可以看到phpinfo的输出页面了

phpinfo.php

<?
phpinfo();
?>

例子1:

表单处理（get）

welcome_get.html

<html>
<body>

<form action="welcome_get.php" method="get">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>

</body>
</html>

welcome_get.php

<html>
<body>

Welcome <?php echo $_GET["name"]; ?><br>
Your email address is: <?php echo $_GET["email"]; ?>

</body>
</html>

例子2:

表单处理（post）

welcome.html

<html>
<body>

<form action="welcome.php" method="post">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>

</body>
</html>

welcome.php

<html>
<body>

Welcome <?php echo $_POST["name"]; ?><br>
Your email address is: <?php echo $_POST["email"]; ?>

</body>
</html>

例子3:

表单验证

<!DOCTYPE HTML>
<html>
<head>
</head>
<body>

<?php
// define variables and set to empty values
$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   $name = test_input($_POST["name"]);
   $email = test_input($_POST["email"]);
   $website = test_input($_POST["website"]);
   $comment = test_input($_POST["comment"]);
   $gender = test_input($_POST["gender"]);
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}
?>

<h2>PHP 验证实例</h2>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
   姓名：<input type="text" name="name">
   <br><br>
   电邮：<input type="text" name="email">
   <br><br>
   网址：<input type="text" name="website">
   <br><br>
   评论：<textarea name="></textarea>
   <br><br>
   性别：
   <input type="radio" name="gender" value="female">女性
   <input type="radio" name="gender" value="male">男性
   <br><br>
   <input type="submit" name="submit" value="提交">
</form>

<?php
echo "<h2>您的输入：</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>

例子4:

表单验证＋必填字段：

<!DOCTYPE HTML>
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>

<?php
// 定义变量并设置为空值
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   if (empty($_POST["name"])) {
     $nameErr = "姓名是必填的";
   } else {
     $name = test_input($_POST["name"]);
   }

   if (empty($_POST["email"])) {
     $emailErr = "电邮是必填的";
   } else {
     $email = test_input($_POST["email"]);
   }

   if (empty($_POST["website"])) {
     $website = "";
   } else {
     $website = test_input($_POST["website"]);
   }

   if (empty($_POST["comment"])) {
     $comment = "";
   } else {
     $comment = test_input($_POST["comment"]);
   }

   if (empty($_POST["gender"])) {
     $genderErr = "性别是必选的";
   } else {
     $gender = test_input($_POST["gender"]);
   }
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}
?>

<h2>PHP 验证实例</h2>
<p><span class="error">* 必需的字段</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
   姓名：<input type="text" name="name">
   <span class="error">* <?php echo $nameErr;?></span>
   <br><br>
   电邮：<input type="text" name="email">
   <span class="error">* <?php echo $emailErr;?></span>
   <br><br>
   网址：<input type="text" name="website">
   <span class="error"><?php echo $websiteErr;?></span>
   <br><br>
   评论：<textarea name="></textarea>
   <br><br>
   性别：
   <input type="radio" name="gender" value="female">女性
   <input type="radio" name="gender" value="male">男性
   <span class="error">* <?php echo $genderErr;?></span>
   <br><br>
   <input type="submit" name="submit" value="提交">
</form>

<?php
echo "<h2>您的输入：</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>

例子5:

表单验证＋必填字段＋正则表达式验证：

<!DOCTYPE HTML>
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body> 

<?php
// 定义变量并设置为空值
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   if (empty($_POST["name"])) {
     $nameErr = "姓名是必填的";
   } else {
     $name = test_input($_POST["name"]);
     // 检查姓名是否包含字母和空白字符
     if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
       $nameErr = "只允许字母和空格";
     }
   }

   if (empty($_POST["email"])) {
     $emailErr = "电邮是必填的";
   } else {
     $email = test_input($_POST["email"]);
     // 检查电子邮件地址语法是否有效
     if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
       $emailErr = "无效的 email 格式";
     }
   }

   if (empty($_POST["website"])) {
     $website = "";
   } else {
     $website = test_input($_POST["website"]);
     // 检查 URL 地址语法是否有效（正则表达式也允许 URL 中的斜杠）
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
       $websiteErr = "无效的 URL";
     }
   }

   if (empty($_POST["comment"])) {
     $comment = "";
   } else {
     $comment = test_input($_POST["comment"]);
   }

   if (empty($_POST["gender"])) {
     $genderErr = "性别是必选的";
   } else {
     $gender = test_input($_POST["gender"]);
   }
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}
?>

<h2>PHP 验证实例</h2>
<p><span class="error">* 必需的字段</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
   姓名：<input type="text" name="name">
   <span class="error">* <?php echo $nameErr;?></span>
   <br><br>
   电邮：<input type="text" name="email">
   <span class="error">* <?php echo $emailErr;?></span>
   <br><br>
   网址：<input type="text" name="website">
   <span class="error"><?php echo $websiteErr;?></span>
   <br><br>
   评论：<textarea name="></textarea>
   <br><br>
   性别：
   <input type="radio" name="gender" value="female">女性
   <input type="radio" name="gender" value="male">男性
   <span class="error">* <?php echo $genderErr;?></span>
   <br><br>
   <input type="submit" name="submit" value="提交">
</form>

<?php
echo "<h2>您的输入：</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>

例子6:

表单完整版本

<!DOCTYPE HTML>
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body> 

<?php
// 定义变量并设置为空值
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   if (empty($_POST["name"])) {
     $nameErr = "姓名是必填的";
   } else {
     $name = test_input($_POST["name"]);
     // 检查姓名是否包含字母和空白字符
     if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
       $nameErr = "只允许字母和空格";
     }
   }

   if (empty($_POST["email"])) {
     $emailErr = "电邮是必填的";
   } else {
     $email = test_input($_POST["email"]);
     // 检查电子邮件地址语法是否有效
     if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
       $emailErr = "无效的 email 格式";
     }
   }

   if (empty($_POST["website"])) {
     $website = "";
   } else {
     $website = test_input($_POST["website"]);
     // 检查 URL 地址语法是否有效（正则表达式也允许 URL 中的斜杠）
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
       $websiteErr = "无效的 URL";
     }
   }

   if (empty($_POST["comment"])) {
     $comment = "";
   } else {
     $comment = test_input($_POST["comment"]);
   }

   if (empty($_POST["gender"])) {
     $genderErr = "性别是必选的";
   } else {
     $gender = test_input($_POST["gender"]);
   }
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}
?>

<h2>PHP 验证实例</h2>
<p><span class="error">* 必需的字段</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
   姓名：<input type="text" name="name">
   <span class="error">* <?php echo $nameErr;?></span>
   <br><br>
   电邮：<input type="text" name="email">
   <span class="error">* <?php echo $emailErr;?></span>
   <br><br>
   网址：<input type="text" name="website">
   <span class="error"><?php echo $websiteErr;?></span>
   <br><br>
   评论：<textarea name="></textarea>
   <br><br>
   性别：
   <input type="radio" name="gender" value="female">女性
   <input type="radio" name="gender" value="male">男性
   <span class="error">* <?php echo $genderErr;?></span>
   <br><br>
   <input type="submit" name="submit" value="提交">
</form>

<?php
echo "<h2>您的输入：</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>

例子7:

连接mysql并且输出数据：

<?php
 $conn=mysql_connect("localhost:3306", "root", "zhenchaowen");
 mysql_query("set names 'utf8'");
 if(!$conn){
   die("could not connect to the database:</br>".mysql_error());//诊断连接错误

 }
 $result=mysql_db_query("testdb001", "SELECT * FROM `customers`", $conn);
    // 获取查询结果
     $row=mysql_fetch_row($result);

    echo '<font face="verdana">';
    echo '<table border="1" cellpadding="1" cellspacing="2">';

    // 显示字段名称
    echo "</b><tr></b>";
    ; $i<mysql_num_fields($result); $i++)
    {
      echo '<td bgcolor="#000F00"><b>'.
      mysql_field_name($result, $i);
      echo "</b></td></b>";
    }
    echo "</tr></b>";
    // 定位到第一条记录
    mysql_data_seek($result, );
    // 循环取出记录
    while ($row=mysql_fetch_row($result))
    {
      echo "<tr></b>";
      ; $i<mysql_num_fields($result); $i++ )
      {
        echo '<td bgcolor="#00FF00">';
        echo $row[$i];
        echo '</td>';
      }
      echo "</tr></b>";
    }

    echo "</table></b>";
    echo "</font>";
    // 释放资源
    mysql_free_result($result);
    // 关闭连接
    mysql_close($conn);
?>

创建插入数据

<html>
<body>

<form action="insert.php" method="post">
 Firstname: <input type="text" name="firstname" />
 Lastname: <input type="text" name="lastname" />
Age: <input type="text" name="age" />
<input type="submit" />
 </form>

 </body>
</html>

<?php
$con = mysql_connect("localhost:3306", "root", "zhenchaowen");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("testdb001", $con);

$sql="INSERT INTO Persons (FirstName, LastName, Age)
VALUES
('$_POST[firstname]','$_POST[lastname]','$_POST[age]')";

if (!mysql_query($sql,$con))
  {
  die('Error: ' . mysql_error());
  }
echo "1 record added";

mysql_close($con)
?>

删除数据

<?php
$con = mysql_connect("localhost:3306", "root", "zhenchaowen");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("testdb001", $con);

mysql_query("DELETE FROM Persons WHERE LastName='Griffin'");

mysql_close($con);
?>

更新数据

<?php
$con = mysql_connect("localhost:3306", "root", "zhenchaowen");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("testdb001", $con);

mysql_query("UPDATE Persons SET Age = '36'
WHERE FirstName = 'Peter' AND LastName = 'Griffin'");

mysql_close($con);
?>

备注：测试前先检查下mysql连接设置：

/usr/bin/mysql -u root -p

例子8:(cookie处理)

创建cookie

<?php
setcookie();
?>

<html>
<body>

</body>
</html>

获取cookie

<?php
// Print a cookie
echo $_COOKIE["user"];

// A way to view all cookies
print_r($_COOKIE);
?>

<html>
<body>

<?php
if (isset($_COOKIE["user"]))
  echo "Welcome " . $_COOKIE["user"] . "!<br />";
else
  echo "Welcome guest!<br />";
?>

</body>
</html>

删除cookie

<?php
// set the expiration date to one hour ago
setcookie();
?>

例子9:（session处理）

开始session和存储session

<?php
session_start();
// store session data
$_SESSION[;
?>

<html>
<body>

<?php
//retrieve session data
echo "Pageviews=". $_SESSION['views'];
?>

</body>
</html>

输出session中的数据

<?php
session_start();

if(isset($_SESSION['views']))
  $_SESSION[;

else
  $_SESSION[;
echo "Views=". $_SESSION['views'];
?>

终结session

<?php
session_destroy();
?>

例子10：（文件上传）

<html>
<body>

<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>

</body>
</html>

<?php
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/pjpeg"))
&& ($_FILES[))
  {
  )
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
    }
  else
    {
    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
    echo "Type: " . $_FILES["file"]["type"] . "<br />";
    echo ) . " Kb<br />";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

    if (file_exists("upload/" . $_FILES["file"]["name"]))
      {
      echo $_FILES["file"]["name"] . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "upload/" . $_FILES["file"]["name"]);
      echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
      }
    }
  }
else
  {
  echo "Invalid file";
  }
?>

11.写文件：

<?php
$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
$txt = "Bill Gates\n";
fwrite($myfile, $txt);
$txt = "Steve Jobs\n";
fwrite($myfile, $txt);
fclose($myfile);
?>

12.文件读取：

<!DOCTYPE html>
<html>
<body>

<?php
$myfile = fopen("upload/newfile.txt", "r") or die("Unable to open file!");
echo fread($myfile,filesize("newfile.txt"));
fclose($myfile);
?>

</body>
</html>

13.xml处理

13.1

<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>

<?php

//Initialize the XML parser
$parser=xml_parser_create();

//Function to use at the start of an element
function start($parser,$element_name,$element_attrs)
  {
  switch($element_name)
    {
    case "NOTE":
    echo "-- Note --<br />";
    break;
    case "TO":
    echo "To: ";
    break;
    case "FROM":
    echo "From: ";
    break;
    case "HEADING":
    echo "Heading: ";
    break;
    case "BODY":
    echo "Message: ";
    }
  }

//Function to use at the end of an element
function stop($parser,$element_name)
  {
  echo "<br />";
  }

//Function to use when finding character data
function char($parser,$data)
  {
  echo $data;
  }

//Specify element handler
xml_set_element_handler($parser,"start","stop");

//Specify data handler
xml_set_character_data_handler($parser,"char");

//Open XML file
$fp=fopen("test.xml","r");

//Read data
))
  {
  xml_parse($parser,$data,feof($fp)) or
  die (sprintf("XML Error: %s at line %d",
  xml_error_string(xml_get_error_code($parser)),
  xml_get_current_line_number($parser)));
  }

//Free the XML parser
xml_parser_free($parser);

?>

13.2

<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>

<?php
$xmlDoc = new DOMDocument();
$xmlDoc->load("note.xml");

$x = $xmlDoc->documentElement;
foreach ($x->childNodes AS $item)
  {
  print $item->nodeName . " = " . $item->nodeValue . "<br />";
  }
?>

13.3

<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>

<?php
$xml = simplexml_load_file("test2.xml");

echo $xml->getName() . "<br />";

foreach($xml->children() as $child)
  {
  echo $child->getName() . ": " . $child . "<br />";
  }
?>

查看host绑定：

mysql> SELECT User, Host, Password FROM mysql.user;
+-------------+-----------------------+-------------------------------------------+
| User        | Host                  | Password                                  |
+-------------+-----------------------+-------------------------------------------+
| root        | localhost             | *232BC6F0ED82F0AD17B03A53D4062D2951F1A1E4 |
| root        | localhost.localdomain | *232BC6F0ED82F0AD17B03A53D4062D2951F1A1E4 |
| root        | 127.0.0.1             | *232BC6F0ED82F0AD17B03A53D4062D2951F1A1E4 |
| demouser    | localhost             | *0756A562377EDF6ED3AC45A00B356AAE6D3C6BB6 |
| zhenchaowen | 192.168.1.105         | *232BC6F0ED82F0AD17B03A53D4062D2951F1A1E4 |
+-------------+-----------------------+-------------------------------------------+
 rows in set (0.01 sec)

mysql>

php解析器测试：

[root@localhost cgi-bin]# php hello3.php
PHP Deprecated:  Comments starting with
PHP Warning:  Directive
<font face=</td><td bgcolor=</td><td bgcolor="#00FF00">ddd</td><td bgcolor="#00FF00">dddd</td></tr></b></table></b></font>

经过上述的步骤，传说中的LAMP架构就这样搭建完成了

顺便提下

yum install httpd

安装的httpd配置在/etc/httpd/conf/httpd.conf 中

如：

ServerName localhost:80

Listen 192.168.1.112:80

另外学一门语言总得把相关的框架给玩一下：

yii为例子（yii的官网：https://github.com/yiisoft/yii）：

执行以下命令：

mkdir YiiPath
cd YiiPath/
git clone https://github.com/yiisoft/yii.git

然后就可以看到如此美丽的配置页面了

CI框架为例子（官网：http://codeigniter.org.cn/）：

wget https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.0
unzip

然后就也可以看到如此美丽的配置页面了

http://192.168.1.112/CodeIgniter-3.0.0/

或者到github上面去找（https://github.com/bcit-ci/CodeIgniter）

mkdir ci
cd ci/
git clone https://github.com/bcit-ci/CodeIgniter.git

http://192.168.1.112/ci/CodeIgniter/

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