3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = array('bar' => false); if (isset($foo['bar'])) { echo 'hello world'; } else { echo 'hello alien'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 5
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/F5PfW
function name:  (null)
number of ops:  7
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        ISSET_ISEMPTY_DIM_OBJ                         0          !0, 'bar'
          2      > JMPZ                                                     ~2, ->5
    6     3    >   ECHO                                                     'hello+world'
          4      > JMP                                                      ->6
    8     5    >   ECHO                                                     'hello+alien'
    9     6    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
152.01 ms | 1392 KiB | 13 Q