## ISSET_ISEMPTY_VAR

## PHP code

`<?php
/*
* Tests if the value of a variable is set or not.
* opcode number: 114
*/
if(isset($a)){ return 0;}
?>`

## PHP opcodes

Function name: (null)

Compiled variables: !0=$a

line | # | op | fetch | ext | return | operands
--- | --- | --- | --- | --- | --- | ---
6 | 0 | ZEND_ISSET_ISEMPTY_VAR |  | 5 | ~0 | !0
| 1 | JMPZ |  |  |  | ~0,->4
| 2 | RETURN |  |  |  | 0
| 3 | JMP |  |  |  | ->4
7 | 4 | RETURN |  |  |  | 1