check email

check_email.php

<?php
function _check_email($email, $strict = false) {
    if ( filter_var($email, FILTER_VALIDATE_EMAIL) ) {
        if ( $strict && function_exists("getmxrr") ) {
            list($prefix, $domain) = split("@",$email);
            return @getmxrr($domain, $maxhost);
        }
        return true;
    }
    return false;
}

// test
echo ( _check_email('mohd.nawawi@gmail.com', false) ? "OK" : "KO" );
echo ( _check_email('mohd.nawawi@gmailaaa.com', true) ? "OK" : "KO" );