Validate IP Address 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!';
- }
- ?>