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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 fetchextreturn operands
60 ZEND_FETCH_CLASS   :0 'A'
 1 NEW   $1 :0
 2 DO_FCALL_BY_NAME  0   
 3 ASSIGN     !0,$1
84 ZEND_FETCH_CLASS   :4 'A'
 5 ZEND_INSTANCEOF   ~5 !0,$4
 6 JMPZ     ~5,->9
97 ECHO     'A'
108 JMP     ->9
119 RETURN     1

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