mb_stripos (PHP 5 >= 5.2.0, PHP 7) mb_stripos - Finds position of first occurrence of a string within another, case insensitive mb_stripos - 大小写不敏感地查找字符串在另一个字符串中首次出现的位置 Description int mb_stripos ( string $haystack , string $needle [, int $offset = 0