再来二十一段救命的PHP代码(2)

    $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 www.2cto.com

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})$", $email))

        if($test_mx)

        {

            list($username, $domain) = split("@", $email);

            return getmxrr($domain, $mxrecords);

        }

        else

            return true;

    else

        return false;

} 5. PHP列出目录内容

 function list_files($dir)

{

    if(is_dir($dir))

    {

        if($handle = opendir($dir))

        {

            while(($file = readdir($handle)) !== false)

            {

                if($file != "." && $file != ".." && $file != "Thumbs.db")

                {

                    echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a><br>'."\n";