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Posted by Juliette on 02/07/06 21:07
prabhuram.k@gmail.com wrote:
> Can anybody know how to validate IPV4 and IPV6 address in PHP. I am
> using PHP 4.2.3 for some compatiability reason.
>
// Regex by Daniel Adam
// http://www.regxlib.com/REDetails.aspx?regexp_id=1139
$pattern[ipv4] =
'/^((\d|[1-9]\d|2[0-4]\d|25[0-5]|1\d\d)(?:\.(\d|[1-9]\d|2[0-4]\d|25[0-5]|1\d\d)){3})$/';
// Checks whether a given IPv6 address string could be valid based on
full and compressed IPv6 addresses as defined in RFC 2373 -
http://www.faqs.org/rfcs/rfc2373.html
// Regex by Jeff Johnson
// http://www.regxlib.com/REDetails.aspx?regexp_id=1000
$pattern[ipv6] =
'/^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))$/';
Pass the value to be tested to the below as $value:
$valid_ipv4 = preg_match( $pattern[ipv4], $value ) ? TRUE : FALSE;
$valid_ipv6 = preg_match( $pattern[ipv6], $value ) ? TRUE : FALSE;
Good luck,
Juliette
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