3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array('top_level_data' => array('extension' => array(), 'sub_level_data1' => 0 ) ); $data['top_level_data']['extension'] = (object)$data['top_level_data']['extension']; $data['top_level_data'] = array($data['top_level_data']); echo json_encode($data, JSON_PRETTY_PRINT); $data = array('top_level_data' => array( array('extension' => (object)array(), 'sub_level_data1' => 0 ) ) ); echo json_encode($data, JSON_PRETTY_PRINT);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PJ71s
function name:  (null)
number of ops:  28
compiled vars:  !0 = $data
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    7     1        FETCH_DIM_R                                      ~4      !0, 'top_level_data'
          2        FETCH_DIM_R                                      ~5      ~4, 'extension'
          3        CAST                                          8  ~6      ~5
          4        FETCH_DIM_W                                      $2      !0, 'top_level_data'
          5        ASSIGN_DIM                                               $2, 'extension'
          6        OP_DATA                                                  ~6
    8     7        FETCH_DIM_R                                      ~8      !0, 'top_level_data'
          8        INIT_ARRAY                                       ~9      ~8
          9        ASSIGN_DIM                                               !0, 'top_level_data'
         10        OP_DATA                                                  ~9
    9    11        INIT_FCALL                                               'json_encode'
         12        SEND_VAR                                                 !0
         13        SEND_VAL                                                 128
         14        DO_ICALL                                         $10     
         15        ECHO                                                     $10
   12    16        CAST                                          8  ~11     <array>
         17        INIT_ARRAY                                       ~12     ~11, 'extension'
   13    18        ADD_ARRAY_ELEMENT                                ~12     0, 'sub_level_data1'
         19        INIT_ARRAY                                       ~13     ~12
         20        INIT_ARRAY                                       ~14     ~13, 'top_level_data'
   11    21        ASSIGN                                                   !0, ~14
   17    22        INIT_FCALL                                               'json_encode'
         23        SEND_VAR                                                 !0
         24        SEND_VAL                                                 128
         25        DO_ICALL                                         $16     
         26        ECHO                                                     $16
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
123.69 ms | 1000 KiB | 14 Q