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<?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 8.0.0


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