note 112579 deleted from function.preg-match by cmb

Note Submitter: hessemanj2100 at gmail dot com ---- The most accurate IPv4 function. It will not allow leading zeros and supports the full address range of 0.0.0.0 - 255.255.255.255 <?php function is_ipv4($string) { // The regular expression checks for any number between 0 and 255 beginning with a dot (repeated 3 times) // followed by another number between 0 and 255 at the end. The equivalent to an IPv4 address. return (bool) preg_match('/^(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])'. '\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]?|[0-9])$/', $string); } ?>