_php_math_number_format_ex 1097 ext/standard/math.c 	return _php_math_number_format_ex(d, dec, &dec_point, 1, &thousand_sep, 1);
_php_math_number_format_ex   26 ext/standard/php_math.h PHPAPI char *_php_math_number_format_ex(double, int, char *, size_t, char *, size_t);