_zval_get_double_func  256 Zend/zend_operators.h ZEND_API double       ZEND_FASTCALL _zval_get_double_func(zval *op);
_zval_get_double_func  263 Zend/zend_operators.h 	return Z_TYPE_P(op) == IS_DOUBLE ? Z_DVAL_P(op) : _zval_get_double_func(op);