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apphp-snippets on 01/28/14

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Last Edited at 01/28/14 10:49pm

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Validate IP Address in PHP

/ Published in: PHP

This code demonstrates a simple way to validate IP address using preg_match() PHP function. This is a very simple code, that allows you to perform this task quickly with a minimum lines of code.

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<?php
$ip_address = '127.0.0.1';
 
if(preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/', $ip_address)){
   echo 'IP address is valid!';
}else{
   echo 'IP address is NOT valid!';
}
?>