voku / portable-utf8

      return \mb_stristr($haystack, $needle, $before_needle, $encoding);

    }

    if (

        $encoding === 'UTF-8' // INFO: "grapheme_stripos()" can't handle other encodings

        &&

        self::$SUPPORT['intl'] === true

    ) {

      return \grapheme_stristr($haystack, $needle, $before_needle);

    }

    if (self::is_ascii($needle) && self::is_ascii($haystack)) {

      return \stristr($haystack, $needle, $before_needle);

      return \mb_strstr($haystack, $needle, $before_needle, $encoding);

    }

    if (

        $encoding === 'UTF-8' // INFO: "grapheme_stripos()" can't handle other encodings

        &&

        self::$SUPPORT['intl'] === true

    ) {

      return \grapheme_strstr($haystack, $needle, $before_needle);

    }

    \preg_match('/^(.*?)' . \preg_quote($needle, '/') . '/us', $haystack, $match);