如何使电子邮件验证功能与EXTR_PREFIX_SAME一起使用？

Question

如何使电子邮件验证功能与EXTR_PREFIX_SAME一起使用？任何建议将不胜感激。谢谢。

这里是PHP文件

<?php 
    extract($_POST, EXTR_PREFIX_SAME, "post"); 

    // Make variable names correspond to form element names with extract and EXTR_PREFIX_SAME 

    // response 
    echo "<h1>Thank you for your interest.</h1>"; 
    echo "<div>Here is a copy of the information you provided:<br/><br/>"; 
    echo "Where did you hear about us: ".$where_hear."<br/>"; 

    // text area 
    echo "Name: ".$name."<br/>"; 
    echo "Email: ".$email."<br/>"; 

    // email validation function 
    function valid_email($email) { 
     $good_email = "/^([a-z0-9_.-]+)@([da-z.-]+).([a-z.]{2,6})$/ "; 
     if (preg_match($good_email, $email)) { 
    echo $email . " is a valid email address.<br>"; 
    return true; 
    } 
    else { 
    echo $email . " is NOT a valid email address.<br>"; 
    return false; 
    } 
    } 
    //email validation function end 

    ?> 

Answer 1

为什么你不使用：

filter_var($value, FILTER_VALIDATE_EMAIL) 

？

我认为是使用PHP验证电子邮件的最佳方法。

if(!filter_var($value, FILTER_VALIDATE_EMAIL)){ 
    echo "Invalid e-mail"; 
}