3v4l.org

run code in 500+ PHP versions simultaneously
<?php function iterate($current, $queue, $result = null) { if (!$current) { return $result; } return iterate(step($queue), $queue, $current); } function step(&$queue) { return next($queue); } function start($queue) { return current($queue); } function traverse($queue) { return iterate(start($queue), $queue); } $queue = ['foo', 'bar', 'baz']; $queue = unserialize(serialize($queue)); echo traverse($queue); //baz
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QmfJM
function name:  (null)
number of ops:  13
compiled vars:  !0 = $queue
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   27     0  E >   ASSIGN                                                       !0, <array>
   29     1        INIT_FCALL                                                   'unserialize'
          2        INIT_FCALL                                                   'serialize'
          3        SEND_VAR                                                     !0
          4        DO_ICALL                                             $2      
          5        SEND_VAR                                                     $2
          6        DO_ICALL                                             $3      
          7        ASSIGN                                                       !0, $3
   31     8        INIT_FCALL                                                   'traverse'
          9        SEND_VAR                                                     !0
         10        DO_FCALL                                          0  $5      
         11        ECHO                                                         $5
         12      > RETURN                                                       1

Function iterate:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 6
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QmfJM
function name:  iterate
number of ops:  16
compiled vars:  !0 = $current, !1 = $queue, !2 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
          2        RECV_INIT                                            !2      null
    5     3        BOOL_NOT                                             ~3      !0
          4      > JMPZ                                                         ~3, ->6
    6     5    > > RETURN                                                       !2
    9     6    >   INIT_FCALL_BY_NAME                                           'iterate'
          7        INIT_FCALL_BY_NAME                                           'step'
          8        SEND_VAR_EX                                                  !1
          9        DO_FCALL                                          0  $4      
         10        SEND_VAR_NO_REF_EX                                           $4
         11        SEND_VAR_EX                                                  !1
         12        SEND_VAR_EX                                                  !0
         13        DO_FCALL                                          0  $5      
         14      > RETURN                                                       $5
   10    15*     > RETURN                                                       null

End of function iterate

Function step:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QmfJM
function name:  step
number of ops:  6
compiled vars:  !0 = $queue
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   12     0  E >   RECV                                                 !0      
   14     1        INIT_FCALL                                                   'next'
          2        SEND_REF                                                     !0
          3        DO_ICALL                                             $1      
          4      > RETURN                                                       $1
   15     5*     > RETURN                                                       null

End of function step

Function start:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QmfJM
function name:  start
number of ops:  6
compiled vars:  !0 = $queue
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   17     0  E >   RECV                                                 !0      
   19     1        INIT_FCALL                                                   'current'
          2        SEND_VAR                                                     !0
          3        DO_ICALL                                             $1      
          4      > RETURN                                                       $1
   20     5*     > RETURN                                                       null

End of function start

Function traverse:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QmfJM
function name:  traverse
number of ops:  10
compiled vars:  !0 = $queue
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   22     0  E >   RECV                                                 !0      
   24     1        INIT_FCALL                                                   'iterate'
          2        INIT_FCALL                                                   'start'
          3        SEND_VAR                                                     !0
          4        DO_FCALL                                          0  $1      
          5        SEND_VAR                                                     $1
          6        SEND_VAR                                                     !0
          7        DO_FCALL                                          0  $2      
          8      > RETURN                                                       $2
   25     9*     > RETURN                                                       null

End of function traverse

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
163.47 ms | 2194 KiB | 20 Q