3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [1, [2, 3]]; $array[1][1] = &$array; json_encode($array); echo json_last_error_msg() . ', ' . json_last_error ();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDZS4
function name:  (null)
number of ops:  15
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        FETCH_DIM_W                                      $2      !0, 1
          2        FETCH_DIM_W                                      $3      $2, 1
          3        ASSIGN_REF                                               $3, !0
    5     4        INIT_FCALL                                               'json_encode'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'json_last_error_msg'
          8        DO_ICALL                                         $6      
          9        CONCAT                                           ~7      $6, '%2C+'
         10        INIT_FCALL                                               'json_last_error'
         11        DO_ICALL                                         $8      
         12        CONCAT                                           ~9      ~7, $8
         13        ECHO                                                     ~9
         14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
140 ms | 1437 KiB | 16 Q