php的功能(13)

    
        $part1 = '<a href="ma';
        $part2 = 'ilto:';
        $part3 = '" '. $attrs .' >';
        $part4 = '</a>';  
    
        $encoded = '<script type="text/javascript">';
        $encoded .= "document.write('$part1');";
        $encoded .= "document.write('$part2');";
        foreach($email as $e)
        {
                $encoded .= "document.write('$e');";
        }
        $encoded .= "document.write('$part3');";
        foreach($linkText as $l)
        {
                $encoded .= "document.write('$l');";
        }
        $encoded .= "document.write('$part4');";
        $encoded .= '</script>';  
    
        return $encoded;
    }

 

 

　　4. PHP验证邮件地址

　　电子邮件验证也许是中最常用的网页表单验证，此代码除了验证电子邮件地址，也可以选择检查邮件域所属 DNS 中的 MX 记录，使邮件验证功能更加强大。

    function is_valid_email($email, $test_mx = false)
    {
        if(eregi("^([_a-z0-9-]+)(\.[_a-z0-9-]+)*@([a-z0-9-]+)(\.[a-z0-9-]+)*(\.[a-z]{2,4}){1}quot;, $email))
            if($test_mx)
            {
                list($username, $domain) = split("@", $email);
                return getmxrr($domain, $mxrecords);
            }
            else
                return true;
        else