the $offset argument.
- strpos(), stripos(), substr_count(), grapheme_strpos(), grapheme_stripos(),
grapheme_extract(), iconv_strpos(), mb_strimwidth(), mb_ereg_search_setpos(),
- mb_strpos() and mb_stripos() now accept negative string offstes.
+ mb_strpos() and mb_stripos() now accept negative string offsets.
- substr_count() and mb_strimwidth() additionally also accept negative length.
- file_get_contents() accepts a negative seek offset if the stream is seekable.