IP Address input validation

[fernandodonster]

How do we validate IP Address when input data
Whether text input field value is in the frmat 124.236.213.222 or not?

[NogDog]

One possibility (untested, so watch out for typos!):

$valid = FALSE;
if(preg_match('/^(\d{1,3}).(\d{1,3}).(\d{1,3}).(\d{1,3})$/', $text, $matches))
{
   $valid = TRUE;
   for($ix = 1; $ix <= 4; $ix++)
   {
      if($matches[$ix] > 255)
      {
         $valid = FALSE;
         break;
      }
   }
}

[Weedpacket]

long2ip(ip2long($ip))==$ip

[NogDog]

Weedpacket wrote:

long2ip(ip2long($ip))==$ip

I suppose if you're too lazy to write your own code, you could do it that way, too. :p 😉