<?php

 //设置cookies

 setcookie("user", "runoob", time()+3600);

 ?>

 <?php

 session_start();

 // 存储 session 数据

 $_SESSION['views']=1;

 ?>

 <html>

  <head>

   <title>PHP 测试</title>

  <meta charset="UTF-8">

  </head>

  <body style="text-align:center">

 <!-- 输出-->

 <?php echo '<p>Hello World</p>' ; ?>

 <!-- for 循环-->

 <?php

 $x=array("one","two","three");

 foreach ($x as $value)

 {

 echo $value . "<br>";

 }

 ?>

 <!--if  判断-->

 <?php

 if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {

 ?>

 <h3>strpos() 肯定没有返回假 (FALSE)</h3>

 <p>正在使用 Internet Explorer</p>

 <?php

 } else {

 ?>

 <h3>strpos() 肯定返回假 (FALSE)</h3>

 <center><b>没有使用 Internet Explorer</b></center>

 <?php

 }

 ?>

 <!--函数定义-->

 <?php

 function add($x,$y)

 {

 $total=$x+$y;

 return $total;

 }

 echo "1 + 16 = " . add(1,16);

 ?>

 <br/>

 <!-- 面向对象-->

  <?php

 class Site {

   /* 成员变量 */

   var $url;

   var $title;

   /* 成员函数 */

   function setUrl($par){

      $this->url = $par;

   }

   function getUrl(){

      echo $this->url . PHP_EOL;

   }

   function setTitle($par){

      $this->title = $par;

   }

   function getTitle(){

      echo $this->title . PHP_EOL;

   }

 }

 $runoob = new Site;

 $taobao = new Site;

 $google = new Site;

 // 调用成员函数，设置标题和URL

 $runoob->setTitle( "菜鸟教程" );

 $taobao->setTitle( "淘宝" );

 $google->setTitle( "Google 搜索" );

 $runoob->setUrl( 'www.runoob.com' );

 $taobao->setUrl( 'www.taobao.com' );

 $google->setUrl( 'www.google.com' );

 // 调用成员函数，获取标题和URL

 $runoob->getTitle();

 $taobao->getTitle();

 $google->getTitle();

 $runoob->getUrl();

 $taobao->getUrl();

 $google->getUrl();

 ?> 

 <!--form表单 , post  方法 -->

 <form action="hello.php" method="post">

  <p>姓名: <input type="text" name="name" /></p>

  <p>年龄: <input type="text" name="age" /></p>

  <p><input type="submit" /></p>

 </form>

 你好<?php echo htmlspecialchars($_POST['name']); ?>,

 你 <?php echo (int)$_POST['age']; ?> 岁了。

 <!-- form表单,get 方法-->

 <form action="hello.php" method="get">

 Name: <input type="text" name="name" /><br/>

 Age: <input type="text" name="age" /><br/>

 <input type="submit" />

 </form>

 Welcome <?php echo $_GET["name"]; ?>.<br />

 You are <?php echo $_GET["age"]; ?> years old!

 <br></br>

 <!--文件上传-->

 <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>

 <!-- cookie -->

 <?php

 if (isset($_COOKIE["user"]))

     echo "欢迎 " . $_COOKIE["user"] . "!<br>";

 else

     echo "普通访客!<br>";

 ?>

 <!--session-->

 <?php echo "浏览量：". $_SESSION['views']; ?>

 <br/>

 <!--创建数据库-->

 <?php

 $servername = "localhost";

 $username = "root";

 $password = "root";

 // 创建连接

 $conn = new mysqli($servername, $username, $password);

 // 检测连接

 if ($conn->connect_error) {

     die("连接失败: " . $conn->connect_error);

 }

 // 创建数据库

 $sql = "CREATE DATABASE myDB";

 if ($conn->query($sql) === TRUE) {

     echo "数据库创建成功";

 } else {

     echo "Error creating database: " . $conn->error;

 }

 $conn->close();

 ?>

 <br/>

 <!--创建数据表-->

 <?php

 $servername = "localhost";

 $username = "root";

 $password = "root";

 $dbname = "myDB";

 // 创建连接

 $conn = new mysqli($servername, $username, $password, $dbname);

 // 检测连接

 if ($conn->connect_error) {

     die("连接失败: " . $conn->connect_error);

 }

 // 使用 sql 创建数据表

 $sql = "CREATE TABLE MyGuests (

 id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,

 firstname VARCHAR(30) NOT NULL,

 lastname VARCHAR(30) NOT NULL,

 email VARCHAR(50),

 reg_date TIMESTAMP

 )";

 if ($conn->query($sql) === TRUE) {

     echo "Table MyGuests created successfully";

 } else {

     echo "创建数据表错误: " . $conn->error;

 }

 $conn->close();

 ?>

 <br/>

 <!--向数据库中添加新的记录-->

 <?php

 $servername = "localhost";

 $username = "root";

 $password = "root";

 $dbname = "myDB";

 // 创建连接

 $conn = new mysqli($servername, $username, $password, $dbname);

 // 检测连接

 if ($conn->connect_error) {

     die("连接失败: " . $conn->connect_error);

 }

 $sql = "INSERT INTO MyGuests (firstname, lastname, email)

 VALUES ('John', 'Doe', 'john@example.com')";

 if ($conn->query($sql) === TRUE) {

     echo "新记录插入成功";

 } else {

     echo "Error: " . $sql . "<br>" . $conn->error;

 }

 $conn->close();

 ?>

  </body>

 </html>

 <?php

 // 允许上传的图片后缀

  header("Content-type: text/html; charset=utf-8");

 $allowedExts = array("gif", "jpeg", "jpg", "png");

 $temp = explode(".", $_FILES["file"]["name"]);

 echo $_FILES["file"]["size"];

 $extension = end($temp);     // 获取文件后缀名

 if ((($_FILES["file"]["type"] == "image/gif")

 || ($_FILES["file"]["type"] == "image/jpeg")

 || ($_FILES["file"]["type"] == "image/jpg")

 || ($_FILES["file"]["type"] == "image/pjpeg")

 || ($_FILES["file"]["type"] == "image/x-png")

 || ($_FILES["file"]["type"] == "image/png"))

 && ($_FILES["file"]["size"] < 204800)   // 小于 200 kb

 && in_array($extension, $allowedExts))

 {

     if ($_FILES["file"]["error"] > 0)

     {

         echo "错误：: " . $_FILES["file"]["error"] . "<br>";

     }

     else

     {

         echo "上传文件名: " . $_FILES["file"]["name"] . "<br>";

         echo "文件类型: " . $_FILES["file"]["type"] . "<br>";

         echo "文件大小: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";

         echo "文件临时存储的位置: " . $_FILES["file"]["tmp_name"] . "<br>";

         // 判断当期目录下的 upload 目录是否存在该文件

         // 如果没有 upload 目录，你需要创建它，upload 目录权限为 777

         if (file_exists("upload/" . $_FILES["file"]["name"]))

         {

             echo $_FILES["file"]["name"] . " 文件已经存在。 ";

         }

         else

         {

             // 如果 upload 目录不存在该文件则将文件上传到 upload 目录下

             move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]);

             echo "文件存储在: " . "upload/" . $_FILES["file"]["name"];

         }

     }

 }

 else

 {

     echo "非法的文件格式";

 }

 ?>