几个php正则表达式结合switch输出的例子

来源：互联网发布：deepin 删除软件编辑：程序博客网时间：2024/06/12 22:32

参考资料：https://www.cnblogs.com/yejianfei/archive/2012/10/18/2729526.html

https://www.cnblogs.com/zcy_soft/archive/2010/10/16/1853239.html (PHP_SELF、 SCRIPT_NAME、 REQUEST_URI区别)

说明：在原文的基础上进行了一定的修改

代码如下↓↓

<?php
    header ( "Content-Type: text/html; charset=UTF-8" );
    $x = "";
    if(!empty($_GET['action'])){
       $x = $_GET['action'];
    }
   switch ($x){
       case "email":
           $email_address = $_POST["email_address"];
            $pattern = "/^([0-9A-Za-z\\-_\\.]+)@([0-9a-z]+\\.[a-z]{2,3}(\\.[a-z]{2})?)$/i";
            // $pattern = "/^([a-z0-9]*[-_\.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[\.][a-z]{2,3}([\.][a-z]{2})?$/i";
            if ( preg_match( $pattern, $email_address ) ){
                $reply1 = "您输入的电子邮件地址合法<br /><br />\n";
                $user_name = preg_replace( $pattern ,"$1", $email_address );
                $domain_name = preg_replace( $pattern ,"$2", $email_address );
                $reply1 .= "用户名：".$user_name."<br />\n";
                $reply1 .= "域名：".$domain_name."<br />\n\n";
            }
            else{
                $reply1 = "您输入的电子邮件地址不合法";
            }
           break;
        case "html":
           $reply2 = "";
           $html = $_POST["html"];
            $pattern = "/<[a-z]{1,20}>.*<\/>|<[a-z]{1,20}[\/]?>/i";
            if ( preg_match( $pattern, $html) ){
                $reply2 = "有html元素";
            }else{
                $reply2 = "没有html元素";
            }
           break;
       case "image":
           $reply3 = "";
           $image = $_POST["image"];
           // $pattern = '/<img.+src=\"(.+\.(jpg|gif|bmp|bnp|png))\"?.+>/is';
           $pattern = '/<img.*?src=[\'|"](.*?(jpg|gif|bmp|bnp|png))[\'|"].*?>/is';
           $pattern = html_entity_decode($pattern);
           if ( preg_match_all( $pattern, $image,$img_src) ){
               foreach ($img_src[1] as $v) {
                   $reply3.= '图片的src地址是：'.$v."<br/>";
               }
            }else{
                $reply3 = "
                没有找到图片的src地址";
            }
            break;
           default:
           break;
   }
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh" xml:lang="zh">
<head>
   <title>php正则表达式</title>
   <style type="text/css">
       div{
           background-color: grey;
       }
       .submit{
           margin-bottom: 6px;
       }
   </style>
</head>
<body style="text-align: center;">
   <h1>php正则表达式</h1>
   <form action="<?php echo htmlentities($_SERVER["PHP_SELF"]);?>?action=email" method="post">
       请输入电子邮件地址：
       <input name="email_address" type="text" style="width: 300px;" class="user_input"/>
       <input type="submit" value="验证电子邮件地址" class="submit" />
   </form>
   <?php
       if(!empty($reply1)){
           echo '<div>提示信息：'.$reply1."</div>";
       }
   ?>
   <form action="<?php echo htmlentities($_SERVER["PHP_SELF"]);?>?action=html" method="post">
       请输入字符串：
       <input name="html" type="text" style="width: 300px;" class="user_input"/>
       <input type="submit" value="验证html元素" class="submit" />
   </form>
   <?php
       if(!empty($reply2)){
           echo '<div>提示信息：'.$reply2."</div>";
       }
   ?>
   <form action="<?php echo htmlentities($_SERVER["SCRIPT_NAME"])?>?action=image" method="post">
       请输入字符串：
       <input name="image" type="text" style="width: 300px;" class="user_input"/>
       <input type="submit" value="找图片src属性值" class="submit" />
   </form>
   <?php
       if(!empty($reply3)){
           echo '<div>提示信息：'.$reply3."</div>";
       }
   ?>
</body>
</html>

效果如下：

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