3v4l.org

run code in 300+ PHP versions simultaneously
<?php $os = new SplObjectStorage; $obj = new StdClass; $os->attach($obj); $os->attach($obj); var_dump($os->count()); var_dump($os->detach($obj), $os->count()); var_dump($os->detach($obj), $os->count());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5hCpL
function name:  (null)
number of ops:  36
compiled vars:  !0 = $os, !1 = $obj
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $2      'SplObjectStorage'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $2
    5     3        NEW                                              $5      'StdClass'
          4        DO_FCALL                                      0          
          5        ASSIGN                                                   !1, $5
    7     6        INIT_METHOD_CALL                                         !0, 'attach'
          7        SEND_VAR_EX                                              !1
          8        DO_FCALL                                      0          
    8     9        INIT_METHOD_CALL                                         !0, 'attach'
         10        SEND_VAR_EX                                              !1
         11        DO_FCALL                                      0          
    9    12        INIT_FCALL                                               'var_dump'
         13        INIT_METHOD_CALL                                         !0, 'count'
         14        DO_FCALL                                      0  $10     
         15        SEND_VAR                                                 $10
         16        DO_ICALL                                                 
   10    17        INIT_FCALL                                               'var_dump'
         18        INIT_METHOD_CALL                                         !0, 'detach'
         19        SEND_VAR_EX                                              !1
         20        DO_FCALL                                      0  $12     
         21        SEND_VAR                                                 $12
         22        INIT_METHOD_CALL                                         !0, 'count'
         23        DO_FCALL                                      0  $13     
         24        SEND_VAR                                                 $13
         25        DO_ICALL                                                 
   11    26        INIT_FCALL                                               'var_dump'
         27        INIT_METHOD_CALL                                         !0, 'detach'
         28        SEND_VAR_EX                                              !1
         29        DO_FCALL                                      0  $15     
         30        SEND_VAR                                                 $15
         31        INIT_METHOD_CALL                                         !0, 'count'
         32        DO_FCALL                                      0  $16     
         33        SEND_VAR                                                 $16
         34        DO_ICALL                                                 
         35      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.93 ms | 1396 KiB | 15 Q