isset_variable   1277 Zend/zend_language_parser.y 		isset_variable			{ $$ = $1; }
isset_variable   1278 Zend/zend_language_parser.y 	|	isset_variables ',' { zend_do_boolean_and_begin(&$1, &$2 TSRMLS_CC); } isset_variable { zend_do_boolean_and_end(&$$, &$1, &$4, &$2 TSRMLS_CC); }
isset_variable   1281 Zend/zend_language_parser.y isset_variable: