library/HTMLPurifier/URIScheme/tel.php

   1 <?php
   2
   3 /**
   4  * Validates tel (for phone numbers).
   5  *
   6  * The relevant specifications for this protocol are RFC 3966 and RFC 5341,
   7  * but this class takes a much simpler approach: we normalize phone
   8  * numbers so that they only include (possibly) a leading plus,
   9  * and then any number of digits and x'es.
  10  */
  11
  12 class HTMLPurifier_URIScheme_tel extends HTMLPurifier_URIScheme
  13 {
  14     /**
  15      * @type bool
  16      */
  17     public $browsable = false;
  18
  19     /**
  20      * @type bool
  21      */
  22     public $may_omit_host = true;
  23
  24     /**
  25      * @param HTMLPurifier_URI $uri
  26      * @param HTMLPurifier_Config $config
  27      * @param HTMLPurifier_Context $context
  28      * @return bool
  29      */
  30     public function doValidate(&$uri, $config, $context)
  31     {
  32         $uri->userinfo = null;
  33         $uri->host     = null;
  34         $uri->port     = null;
  35
  36         // Delete all non-numeric characters, non-x characters
  37         // from phone number, EXCEPT for a leading plus sign.
  38         $uri->path = preg_replace('/(?!^\+)[^\dx]/', '',
  39                      // Normalize e(x)tension to lower-case
  40                      str_replace('X', 'x', $uri->path));
  41
  42         return true;
  43     }
  44 }
  45
  46 // vim: et sw=4 sts=4