Posted By

apphp-snippets on 01/28/14


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php validation apphp


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Validate IP Address in PHP


 / Published in: PHP
 

URL: http://www.apphp.com/index.php?snippet=php-validate-ip-address

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.

  1. <?php
  2. $ip_address = '127.0.0.1';
  3.  
  4. if(preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/', $ip_address)){
  5. echo 'IP address is valid!';
  6. }else{
  7. echo 'IP address is NOT valid!';
  8. }
  9. ?>

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