3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = array_merge([], (array)null, array(1,23,4)); var_dump($x);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rWjsN
function name:  (null)
number of ops:  11
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'array_merge'
          1        SEND_VAL                                                 <array>
          2        CAST                                          7  ~1      null
          3        SEND_VAL                                                 ~1
          4        SEND_VAL                                                 <array>
          5        DO_ICALL                                         $2      
          6        ASSIGN                                                   !0, $2
    3     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.01 ms | 1394 KiB | 17 Q