date_period_read_property  644 ext/date/php_date.c static zval *date_period_read_property(zval *object, zval *member, int type, const zend_literal *key TSRMLS_DC);
date_period_read_property 2104 ext/date/php_date.c 	date_object_handlers_period.read_property = date_period_read_property;