INIT_STRING
ISSET_ISEMPTY_DIM_OBJ
Opcodes
PHP Manual

## 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

INIT_STRING
ISSET_ISEMPTY_DIM_OBJ
Opcodes
PHP Manual