3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(json_decode('{"":""}')); var_dump(json_decode('{"":""}', 1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/X16Md
function name:  (null)
number of ops:  14
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'json_decode'
          2        SEND_VAL                                                 '%7B%22%22%3A%22%22%7D'
          3        DO_ICALL                                         $0      
          4        SEND_VAR                                                 $0
          5        DO_ICALL                                                 
    3     6        INIT_FCALL                                               'var_dump'
          7        INIT_FCALL                                               'json_decode'
          8        SEND_VAL                                                 '%7B%22%22%3A%22%22%7D'
          9        SEND_VAL                                                 1
         10        DO_ICALL                                         $2      
         11        SEND_VAR                                                 $2
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
148.69 ms | 1398 KiB | 17 Q