3v4l.org

run code in 300+ PHP versions simultaneously
<?php $app = array('bar' => null, 'baz' => ''); var_dump(isset($app['foo'])); var_dump(isset($app['bar'])); var_dump(isset($app['baz']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Of2j8
function name:  (null)
number of ops:  14
compiled vars:  !0 = $app
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'var_dump'
          2        ISSET_ISEMPTY_DIM_OBJ                         0  ~2      !0, 'foo'
          3        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    5     5        INIT_FCALL                                               'var_dump'
          6        ISSET_ISEMPTY_DIM_OBJ                         0  ~4      !0, 'bar'
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
    6     9        INIT_FCALL                                               'var_dump'
         10        ISSET_ISEMPTY_DIM_OBJ                         0  ~6      !0, 'baz'
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
142.8 ms | 1385 KiB | 15 Q