ZEND_CONCAT      4003 Zend/zend_language_parser.c     { zend_do_binary_op(ZEND_CONCAT, &(yyval), &(yyvsp[(1) - (3)]), &(yyvsp[(3) - (3)]) TSRMLS_CC); }
ZEND_CONCAT       582 Zend/zend_language_parser.y 	|	expr '.' expr 	{ zend_do_binary_op(ZEND_CONCAT, &$$, &$1, &$3 TSRMLS_CC); }
ZEND_CONCAT       463 Zend/zend_opcode.c 		case ZEND_CONCAT:
ZEND_CONCAT       119 Zend/zend_vm_def.h ZEND_VM_HANDLER(8, ZEND_CONCAT, CONST|TMP|VAR|CV, CONST|TMP|VAR|CV)