Php/docs/internals2.opcodes.instanceof

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• Opcode Descriptions and Examples
• INSTANCEOF

INSTANCEOF

PHP code

<?php/* *  * opcode number: 138 */$obj = new A();if ($obj instanceof A) {   echo 'A';}?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$obj

line	#	op	fetch	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