php 한글 메뉴얼 도움말 검색 사이트 INSTANCEOF [internals2.opcodes.instanceof]

INSTANCEOF


<?php
/*
 * 
 * opcode number: 138
 */
$obj = new A();

if ($obj instanceof A) {
   echo 'A';
}
?>

Function name: (null)

Compiled variables: !0=$obj

line	#	op	ext	return	operands
6	0	ZEND_FETCH_CLASS		:0	'A'
	1	NEW		$1	:0
	2	DO_FCALL_BY_NAME	0
	3	ASSIGN			!0,$1
8	4	ZEND_FETCH_CLASS		:4	'A'
	5	ZEND_INSTANCEOF		~5	!0,$4
	6	JMPZ			~5,->9
9	7	ECHO			'A'
10	8	JMP			->9
11	9	RETURN			1