3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; define('Foo\\true', false, true); define('Foo\\false', true, true); $a = true; var_dump($a); if (!$a) { echo 'this should print'; } else { echo 'WTF man!!!'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 16, Position 2 = 18
Branch analysis from position: 16
1 jumps found. (Code = 42) Position 1 = 19
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZuHnM
function name:  (null)
number of ops:  20
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_NS_FCALL_BY_NAME                                    'Foo%5Cdefine'
          1        SEND_VAL_EX                                              'Foo%5Ctrue'
          2        SEND_VAL_EX                                              <false>
          3        SEND_VAL_EX                                              <true>
          4        DO_FCALL                                      0          
    4     5        INIT_NS_FCALL_BY_NAME                                    'Foo%5Cdefine'
          6        SEND_VAL_EX                                              'Foo%5Cfalse'
          7        SEND_VAL_EX                                              <true>
          8        SEND_VAL_EX                                              <true>
          9        DO_FCALL                                      0          
    6    10        ASSIGN                                                   !0, <true>
    7    11        INIT_NS_FCALL_BY_NAME                                    'Foo%5Cvar_dump'
         12        SEND_VAR_EX                                              !0
         13        DO_FCALL                                      0          
    8    14        BOOL_NOT                                         ~5      !0
         15      > JMPZ                                                     ~5, ->18
   10    16    >   ECHO                                                     'this+should+print'
         17      > JMP                                                      ->19
   13    18    >   ECHO                                                     'WTF+man%21%21%21'
   14    19    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
166.8 ms | 1395 KiB | 17 Q