filter/emailprotect/filter.php

   1 <?PHP // $Id$
   2       // This function looks for email addresses in Moodle text and
   3       // hides them using the Moodle obfuscate_text function.
   4       // Original code by Mike Churchward
   5
   6 function emailprotect_filter($courseid, $text) {
   7
   8
   9     if (!empty($CFG->formatstring)) {
  10         return $text;
  11     }
  12
  13 /// Do a quick check using stripos to avoid unnecessary work
  14     if (strpos($text, '@') === false) {
  15         return $text;
  16     }
  17
  18 /// There might be an email in here somewhere so continue ...
  19     $matches = array();
  20
  21 /// regular expression to define a standard email string.
  22     $emailregex = '((?:[\w\.\-])+\@(?:(?:[a-zA-Z\d\-])+\.)+(?:[a-zA-Z\d]{2,4}))';
  23
  24 /// pattern to find a mailto link with the linked text.
  25     $pattern = '|(<a\s+href\s*=\s*[\'"]?mailto:)'.$emailregex.'([\'"]?\s*>)'.'(.*)'.'(</a>)|iU';
  26     $text = preg_replace_callback($pattern, 'alter_mailto', $text);
  27
  28 /// pattern to find any other email address in the text.
  29     $pattern = '/(^|\s+|>)'.$emailregex.'($|\s+|\.\s+|\.$|<)/i';
  30     $text = preg_replace_callback($pattern, 'alter_email', $text);
  31
  32     return $text;
  33 }
  34
  35
  36 function alter_email($matches) {
  37     return $matches[1].obfuscate_text($matches[2]).$matches[3];
  38 }
  39
  40
  41 function alter_mailto($matches) {
  42     return obfuscate_mailto($matches[2], $matches[4]);
  43 }
  44
  45 ?>