mb_ereg() executes the regular expression match with multibyte support, and returns 1 if matches are found. If the optional third parameter was specified, the function returns the byte length of matched part, and the array regs will contain the substring of matched string. The functions returns 1 if it matches with the empty string. If no matches found or error happend, FALSE will be returned.
The internal encoding or the character encoding specified in mb_regex_encoding() will be used as character encoding.
See also: mb_regex_encoding(), mb_eregi()