The function mb_ereg_search_pos() returns matched byte length, not the position of the search part.
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
mb_ereg_search_getpos — Returns start point for next regular expression match
Returns the start point for the next regular expression match.
This function has no parameters.
mb_ereg_search_getpos() returns the point to start regular expression match for mb_ereg_search(), mb_ereg_search_pos(), mb_ereg_search_regs(). The position is represented by bytes from the head of string.
Note:
The internal encoding or the character encoding specified by mb_regex_encoding() will be used as the character encoding for this function.
The function mb_ereg_search_pos() returns matched byte length, not the position of the search part.