Regex Help for Codeigniter URL Helper

Question

In CI url_title() function, it removes dots from string whereas I want to replace with $seperator. Here is url_title()'s regex replacement array.

$trans = array(
  '&.+?;'                 => '',
  '[^a-z0-9 _-]'          => '',
  '\s+'                   => $separator,
  '('.$q_separator.')+'   => $separator
);

$str = strip_tags($str);

foreach ($trans as $key => $val)
{
   $str = preg_replace("#".$key."#i", $val, $str);
}

How can I change $trans array so it can replace ".", "%", "+" characters with $separator.

Another one is "%20" returns as nothing. How to prevent it?

Thanks for any help.

Answer 1

Try this:

$trans = array(
  '&.+?;'                 => '',
  '[^a-z0-9 _-]'          => '',
  '\s+'                   => $separator,
  '('.$q_separator.')+'   => $separator,
  '\.'                    => $separator,
  '\+'                    => $separator,
  '%'                     => $separator
);