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PHP Manual

INIT_METHOD_CALL

PHP code

<?php
/*
 * Prepare for a method call.  Followed by DO_FCALL.
 * opcode number: 112
 */
class {
  var 
$num;
    function 
incrementNum(){
    
$num++;
  }
}

$obj = new A();
$obj->incrementNum();

?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$obj

line#op fetchextreturn operands
60 NOP? ?? ?
131 ZEND_FETCH_CLASS? ?:1 'A'
?2 NEW? ?$2 :1
?3 DO_FCALL_BY_NAME? 0? ?
?4 ASSIGN? ?? !0,$2
145 ZEND_INIT_METHOD_CALL? ?? !0,'incrementNum'
?6 DO_FCALL_BY_NAME? 0? ?
167 RETURN? ?? 1

Function name: incrementNum

Compiled variables: !0=$num

line#op fetchextreturn operands
90 POST_INC? ?~0 !0
?1 FREE? ?? ~0
102 RETURN? ?? null

オペコード一覧
PHP Manual