Posted By

Scooter on 07/26/08


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regular expressions


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vali29


isValidIP


 / Published in: PHP
 

URL: http://reusablecode.blogspot.com/2008/07/isvalidip.html

  1. <?php
  2. /*
  3.   Copyright (c) 2008, reusablecode.blogspot.com; some rights reserved.
  4.  
  5.   This work is licensed under the Creative Commons Attribution License. To view
  6.   a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ or
  7.   send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California
  8.   94305, USA.
  9.   */
  10.  
  11. // Validate an IP address.
  12. function isValidIP($ip)
  13. {
  14. $pattern = "/^([1]?\d{1,2}|2[0-4]{1}\d{1}|25[0-5]{1})(\.([1]?\d{1,2}|2[0-4]{1}\d{1}|25[0-5]{1})){3}$/";
  15. return (preg_match($pattern, $ip) > 0) ? true : false;
  16. }
  17. ?>

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