(PHP 4 >= 4.2.0, PHP 5)
mb_ereg_replace — Replace regular expression with multibyte support
Scans string for matches to pattern, then replaces the matched text with replacement
The regular expression pattern.
Multibyte characters may be used in pattern.
The replacement text.
The string being checked.
The resultant string on success, or FALSE on error.
The internal encoding or the character encoding specified by mb_regex_encoding() will be used as the character encoding for this function.
Never use the e modifier when working on untrusted input. No automatic escaping will happen (as known from preg_replace()). Not taking care of this will most likely create remote code execution vulnerabilities in your application.