<?php header ( "Content-Type: text/html; charset=UTF-8" ); $reply = ""; if ( isset($_POST["email_address"]) ) { $email_address = $_POST["email_address"]; $pattern = "/^([0-9A-Za-z\\-_\\.]+)@([0-9a-z]+\\.[a-z]{2,3}(\\.[a-z]{2})?)$/i"; if ( preg_match( $pattern, $email_address ) ) { $reply = "您输入的电子邮件地址合法

\n"; $user_name = preg_replace( $pattern ,"$1", $email_address ); $domain_name = preg_replace( $pattern ,"$2", $email_address ); $reply .= "用户名：".$user_name."
\n"; $reply .= "域名：".$domain_name."
\n\n"; } else { $reply = "您输入的电子邮件地址不合法"; } } ?>     
  
电子邮件地址验证程序
 
 请输入电子邮件地址：
  
 <?php echo $reply; ?>