3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (null == $_SESSION) { echo 'null true'; } ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 4
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
filename:       /in/2ZaoM
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   FETCH_R                      global              ~0      '_SESSION'
          1        IS_EQUAL                                                 ~0, null
          2      > JMPZ                                                     ~1, ->4
    4     3    >   ECHO                                                     'null+true'
    6     4    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.64 ms | 1392 KiB | 13 Q