backticks_expr    241 Zend/zend_language_parser.y %type <ast> exit_expr scalar backticks_expr lexical_var function_call member_name property_name
backticks_expr    956 Zend/zend_language_parser.y 	|	'`' backticks_expr '`' { $$ = zend_ast_create(ZEND_AST_SHELL_EXEC, $2); }
backticks_expr   1030 Zend/zend_language_parser.y backticks_expr: