3v4l.org

run code in 300+ PHP versions simultaneously
<?php $value = null; echo !is_null($value) ? 1 : 0;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 6
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9HMeB
function name:  (null)
number of ops:  9
compiled vars:  !0 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, null
    3     1        TYPE_CHECK                                    2  ~2      !0
          2        BOOL_NOT                                         ~3      ~2
          3      > JMPZ                                                     ~3, ->6
          4    >   QM_ASSIGN                                        ~4      1
          5      > JMP                                                      ->7
          6    >   QM_ASSIGN                                        ~4      0
          7    >   ECHO                                                     ~4
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
144.48 ms | 1384 KiB | 13 Q