ZEND_PARSED_REFERENCE_VARIABLE 3827 Zend/zend_compile.c if ((key->op_type != IS_UNUSED) && (key->u.EA.type & ZEND_PARSED_REFERENCE_VARIABLE)) { ZEND_PARSED_REFERENCE_VARIABLE 3831 Zend/zend_compile.c if (value->u.EA.type & ZEND_PARSED_REFERENCE_VARIABLE) { ZEND_PARSED_REFERENCE_VARIABLE 3448 Zend/zend_language_parser.c { zend_check_writable_variable(&(yyvsp[(2) - (2)])); (yyval) = (yyvsp[(2) - (2)]); (yyval).u.EA.type |= ZEND_PARSED_REFERENCE_VARIABLE; } ZEND_PARSED_REFERENCE_VARIABLE 340 Zend/zend_language_parser.y | '&' variable { zend_check_writable_variable(&$2); $$ = $2; $$.u.EA.type |= ZEND_PARSED_REFERENCE_VARIABLE; }