(PHP 5 >= 5.4.1, PHP 7)
Perform a regular expresssion seach and replace with multibyte support using a callback
string mb_ereg_replace_callback ( string $pattern, callable $callback, string $string [, string $option = "msr" ] )
Scans string for matches to pattern, then replaces the matched text with the output of callback function.
The behavior of this function is almost identical to mb_ereg_replace(), except for the