Extracts e-mail addresses

<?php
/**
 * Extracts e-mail addresses from a string
 *
 */
function mymodule_extract_mailaddresses($string) {
  $string = check_plain($string);
 
  $string =  preg_replace('/[^a-öA-Ö0-9\s@.-]/', ' ', $string);
 
  $array = explode(' ', $string);
 
  foreach ($array as $key => $value) {
    if(stristr($value, '@')){
      $email[$value] = trim($value);
      //watchdog('test_v', 'Test: '.trim($value), WATCHDOG_DEBUG);
    }
  }
 
 
  return $email;
}
?>
Knowledge keywords: 
PHP
function
e-mail