ZEND_CALL_FRAME_SLOT  489 Zend/zend_compile.h 	(((zval*)(call)) + (ZEND_CALL_FRAME_SLOT + ((int)(n))))
ZEND_CALL_FRAME_SLOT 2316 Zend/zend_execute.c 	size_t stack_size = (ZEND_CALL_FRAME_SLOT + MAX(op_array->last_var + op_array->T, num_args)) * sizeof(zval);
ZEND_CALL_FRAME_SLOT  195 Zend/zend_execute.h 	uint32_t used_stack = ZEND_CALL_FRAME_SLOT + num_args;