mb_eregi Regular expression match ignoring case with multibyte support intmb_eregi stringpattern stringstring arrayregs &warn.experimental.func; mb_eregi executes the regular expression match with multibyte support, and returns 1 if matches are found. This function ignore case. If the optional third parameter was specified, the function returns the byte length of matched part, and therarray regs will contain the substring of matched string. The functions returns 1 if it matches with the empty string. It no matche 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. This function is supported in PHP 4.2.0 or higher. See also: mb_regex_encoding, mb_ereg.