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<?php $a = [['key'=>'val1'],['key'=>'val2']]; print_r($a); print_r(array_column($a, 'key'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5U2Uj
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        INIT_FCALL                                               'print_r'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    4     4        INIT_FCALL                                               'print_r'
          5        INIT_FCALL                                               'array_column'
          6        SEND_VAR                                                 !0
          7        SEND_VAL                                                 'key'
          8        DO_ICALL                                         $3      
          9        SEND_VAR                                                 $3
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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