3v4l.org

run code in 300+ PHP versions simultaneously
<?php $k = (string)"0"; $a = array( 'name' => 'a', $k => 'null' ); $b = array( 'name' => 'b', $k => 'zero' ); $c = array( $k => 'zeronull', 'name' => 'c' ); var_dump($a); var_dump($b); var_dump($c); var_dump(array_merge($a, $b)); var_dump($a + $b); var_dump(array_merge($a, $c)); var_dump($a + $c); var_dump(array_merge($a, $b, $c)); var_dump($a + $b + $c);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/o4RnP
function name:  (null)
number of ops:  56
compiled vars:  !0 = $k, !1 = $a, !2 = $b, !3 = $c
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   CAST                                          6  ~4      '0'
          1        ASSIGN                                                   !0, ~4
    3     2        INIT_ARRAY                                       ~6      'a', 'name'
          3        ADD_ARRAY_ELEMENT                                ~6      'null', !0
          4        ASSIGN                                                   !1, ~6
    4     5        INIT_ARRAY                                       ~8      'b', 'name'
          6        ADD_ARRAY_ELEMENT                                ~8      'zero', !0
          7        ASSIGN                                                   !2, ~8
    5     8        INIT_ARRAY                                       ~10     'zeronull', !0
          9        ADD_ARRAY_ELEMENT                                ~10     'c', 'name'
         10        ASSIGN                                                   !3, ~10
    8    11        INIT_FCALL                                               'var_dump'
         12        SEND_VAR                                                 !1
         13        DO_ICALL                                                 
    9    14        INIT_FCALL                                               'var_dump'
         15        SEND_VAR                                                 !2
         16        DO_ICALL                                                 
   10    17        INIT_FCALL                                               'var_dump'
         18        SEND_VAR                                                 !3
         19        DO_ICALL                                                 
   11    20        INIT_FCALL                                               'var_dump'
         21        INIT_FCALL                                               'array_merge'
         22        SEND_VAR                                                 !1
         23        SEND_VAR                                                 !2
         24        DO_ICALL                                         $15     
         25        SEND_VAR                                                 $15
         26        DO_ICALL                                                 
   12    27        INIT_FCALL                                               'var_dump'
         28        ADD                                              ~17     !1, !2
         29        SEND_VAL                                                 ~17
         30        DO_ICALL                                                 
   13    31        INIT_FCALL                                               'var_dump'
         32        INIT_FCALL                                               'array_merge'
         33        SEND_VAR                                                 !1
         34        SEND_VAR                                                 !3
         35        DO_ICALL                                         $19     
         36        SEND_VAR                                                 $19
         37        DO_ICALL                                                 
   14    38        INIT_FCALL                                               'var_dump'
         39        ADD                                              ~21     !1, !3
         40        SEND_VAL                                                 ~21
         41        DO_ICALL                                                 
   15    42        INIT_FCALL                                               'var_dump'
         43        INIT_FCALL                                               'array_merge'
         44        SEND_VAR                                                 !1
         45        SEND_VAR                                                 !2
         46        SEND_VAR                                                 !3
         47        DO_ICALL                                         $23     
         48        SEND_VAR                                                 $23
         49        DO_ICALL                                                 
   16    50        INIT_FCALL                                               'var_dump'
         51        ADD                                              ~25     !1, !2
         52        ADD                                              ~26     ~25, !3
         53        SEND_VAL                                                 ~26
         54        DO_ICALL                                                 
         55      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.56 ms | 1400 KiB | 17 Q