date_object_compare_date  626 ext/date/php_date.c static int date_object_compare_date(zval *d1, zval *d2 TSRMLS_DC);
date_object_compare_date 2017 ext/date/php_date.c 	date_object_handlers_date.compare_objects = date_object_compare_date;
date_object_compare_date 2042 ext/date/php_date.c 	date_object_handlers_immutable.compare_objects = date_object_compare_date;