<?php function validateEmail($email)  {     return eregi("^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$", $email);  }  function validateURL($url)  {     return eregi("^((ht|f)tp://)((([a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3}))|(([0-9]{1,3}.){3}([0-9]{1,3})))((/|?)[a-z0-9~#%&"_+=:?.-]*)*)$", $url);  }  function convertURLS($text)  {     $text = eregi_replace("((ht|f)tp://www.|www.)([a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})((/|?)[a-z0-9~#%&\/"_+=:?.-]*)*)", "http://www.\3", $text);      $text = eregi_replace("((ht|f)tp://)((([a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3}))|(([0-9]{1,3}.){3}([0-9]{1,3})))((/|?)[a-z0-9~#%&"_+=:?.-]*)*)", "<a href="\0">\0</a>", $text);      return $text;  }  function convertMail($text)  {     $text = eregi_replace("([_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3}))", "<a href="mailto:\0">\0</a>", $text);      return $text;  }  function convertAllLinks($text)  {     $text = convertURLS($text);      $text = convertMail($text);      return $text;  } ?>