3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = null; switch ($foo) { case 1: echo "case 1"; break; case true: echo "case true"; break; case false: echo "case false"; break; case 0: echo "case 0"; break; default: echo "default"; break; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 44) Position 1 = 3, Position 2 = 10
Branch analysis from position: 3
2 jumps found. (Code = 44) Position 1 = 5, Position 2 = 12
Branch analysis from position: 5
2 jumps found. (Code = 44) Position 1 = 7, Position 2 = 14
Branch analysis from position: 7
2 jumps found. (Code = 44) Position 1 = 9, Position 2 = 16
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
filename:       /in/TY4DP
function name:  (null)
number of ops:  21
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    6     1        IS_EQUAL                                                 !0, 1
          2      > JMPNZ                                                    ~2, ->10
    5     3    >   IS_EQUAL                                                 !0, <true>
          4      > JMPNZ                                                    ~2, ->12
   12     5    >   IS_EQUAL                                                 !0, <false>
          6      > JMPNZ                                                    ~2, ->14
   15     7    >   IS_EQUAL                                                 !0, 0
          8      > JMPNZ                                                    ~2, ->16
          9    > > JMP                                                      ->18
    7    10    >   ECHO                                                     'case+1'
    8    11      > JMP                                                      ->20
   10    12    >   ECHO                                                     'case+true'
   11    13      > JMP                                                      ->20
   13    14    >   ECHO                                                     'case+false'
   14    15      > JMP                                                      ->20
   16    16    >   ECHO                                                     'case+0'
   17    17      > JMP                                                      ->20
   19    18    >   ECHO                                                     'default'
   20    19      > JMP                                                      ->20
   21    20    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
263.23 ms | 1003 KiB | 13 Q