3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( 'a' => 'A', 'b' => 'B', 'c' => 'C'); var_dump($arr); foreach ($arr as &$val) { if ($val == 'B') { unset($val); } } var_dump($arr); foreach ($arr as &$val) { if ($val == 'B') { $val = 'X'; } } var_dump($arr);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 125) Position 1 = 5, Position 2 = 10
Branch analysis from position: 5
2 jumps found. (Code = 126) Position 1 = 6, Position 2 = 10
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 9
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
Branch analysis from position: 9
Branch analysis from position: 10
2 jumps found. (Code = 125) Position 1 = 15, Position 2 = 20
Branch analysis from position: 15
2 jumps found. (Code = 126) Position 1 = 16, Position 2 = 20
Branch analysis from position: 16
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 19
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 15
Branch analysis from position: 15
Branch analysis from position: 19
Branch analysis from position: 20
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 20
Branch analysis from position: 10
filename:       /in/87F4m
function name:  (null)
number of ops:  25
compiled vars:  !0 = $arr, !1 = $val
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    8     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
   10     4      > FE_RESET_RW                                      $4      !0, ->10
          5    > > FE_FETCH_RW                                              $4, !1, ->10
   11     6    >   IS_EQUAL                                                 !1, 'B'
          7      > JMPZ                                                     ~5, ->9
   12     8    >   UNSET_CV                                                 !1
   10     9    > > JMP                                                      ->5
         10    >   FE_FREE                                                  $4
   16    11        INIT_FCALL                                               'var_dump'
         12        SEND_VAR                                                 !0
         13        DO_ICALL                                                 
   18    14      > FE_RESET_RW                                      $7      !0, ->20
         15    > > FE_FETCH_RW                                              $7, !1, ->20
   19    16    >   IS_EQUAL                                                 !1, 'B'
         17      > JMPZ                                                     ~8, ->19
   20    18    >   ASSIGN                                                   !1, 'X'
   18    19    > > JMP                                                      ->15
         20    >   FE_FREE                                                  $7
   24    21        INIT_FCALL                                               'var_dump'
         22        SEND_VAR                                                 !0
         23        DO_ICALL                                                 
         24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
146.41 ms | 1396 KiB | 15 Q