note 111478 modified in function.trim by danbrown

When you choose characters to trim, the defaults are replaced by those, so if you wish to trim the defaults in addition to some extras, you need to specify the defaults every time. Here is a little helper function that will trim the defaults, plus your additions: <?php function trim_plus($str, $chars = '') { return trim($str, " \t\n\r\0\x0B$chars"); } var_dump(trim(' a- ', '-')); # no changes var_dump(trim(' a- ', '- ')); # works var_dump(trim_plus(' a- ', '-')); # works ?> --was-- When you choose characters to trim, the defaults are replaced by those, so if you wish to trim the defaults in addition to some extras, you need to specify the defaults every time. Here is a little helper function that will trim the defaults, plus your additions: function trim_plus($str, $chars = '') { return trim($str, " \t\n\r\0\x0B$chars"); } var_dump(trim(' a- ', '-')); # no changes var_dump(trim(' a- ', '- ')); # works var_dump(trim_plus(' a- ', '-')); # works http://php.net/manual/en/function.trim.php