<?php 
 
function is_valid_url($url){
    $p1 ='/(http|https|ftp):\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i';
    return preg_match($p1, $url); 
}



function is_valid_email($email){
    if (filter_var($email, FILTER_VALIDATE_EMAIL))
        return true;
    else
        return false;
}


function is_valid_ip($ip){
    if (filter_var($ip, FILTER_VALIDATE_IP))
        return true;
    else
        return false;
}

?>

http://function-code.blogspot.com/2013/10/url-email-ip-validation-with-php.html

Simple PHP functions to validate url, email address and ip, functions will return TRUE for valid data and FALSE for invalid data.

url, email and ip validation with php

email, url, php, validation, ip

PHP