3v4l.org

run code in 300+ PHP versions simultaneously
<?php $targetArray = array('a'=>'','b'=>'','c'=>'','d'=>''); $sourceArray = array('a'=>'a','c'=>'c','d'=>'d'); var_export(array_replace($targetArray, $sourceArray)); var_export($sourceArray + $targetArray);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/S9L2G
function name:  (null)
number of ops:  14
compiled vars:  !0 = $targetArray, !1 = $sourceArray
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <array>
    5     2        INIT_FCALL                                               'var_export'
          3        INIT_FCALL                                               'array_replace'
          4        SEND_VAR                                                 !0
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                         $4      
          7        SEND_VAR                                                 $4
          8        DO_ICALL                                                 
    6     9        INIT_FCALL                                               'var_export'
         10        ADD                                              ~6      !1, !0
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
135.7 ms | 997 KiB | 15 Q