3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = "Testing"; echo --$test; // Echos "Testing" echo -$test; // Echos 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRuOM
function name:  (null)
number of ops:  6
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Testing'
    4     1        PRE_DEC                                          ~2      !0
          2        ECHO                                                     ~2
    5     3        MUL                                              ~3      !0, -1
          4        ECHO                                                     ~3
          5      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
155.88 ms | 1383 KiB | 13 Q