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Validate a domain name.

/ Published in: PHP
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The following function validates and returns TRUE or FALSE if the supplied string could be a valid domain name format.

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  1. <?php
  2. function validUrl($url) {
  3.     if (preg_match('/^(http|https|ftp)://([A-Z0-9][A-Z0-9_-]*(?:.[A-Z0-9][A-Z0-9_-]*)+):?(d+)?/?/i', $url)) {
  4.         return TRUE;
  5.     else
  6.         return FALSE;
  7.     }
  8. }
  9. ?>

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