3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 0; if ( ! $a++ ) echo 'Z'; else echo '-';
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/aKDiG
function name:  (null)
number of ops:  8
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 0
    3     1        POST_INC                                         ~2      !0
          2        BOOL_NOT                                         ~3      ~2
          3      > JMPZ                                                     ~3, ->6
    4     4    >   ECHO                                                     'Z'
          5      > JMP                                                      ->7
    6     6    >   ECHO                                                     '-'
          7    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
184.36 ms | 1392 KiB | 13 Q