3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a = [ ["userid" => 1], ["userid" => 2], ["userid" => 3], ]; $a = array_map("array_flip", $a); print_r($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/r6BGD
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    9     1        INIT_FCALL                                                   'array_map'
          2        SEND_VAL                                                     'array_flip'
          3        SEND_VAR                                                     !0
          4        DO_ICALL                                             $2      
          5        ASSIGN                                                       !0, $2
   11     6        INIT_FCALL                                                   'print_r'
          7        SEND_VAR                                                     !0
          8        DO_ICALL                                                     
          9      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
173.28 ms | 2342 KiB | 15 Q