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<?php $arr = Array ( 0 => Array ( 0 => Red, 1 => Steel ), 1 => Array ( 0 => Red, 1 => Wood ) , 2 => Array ( 0 => Blue, 1 => Wood ) ); $a = array_column($arr, 0);print_r($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fXa0S
function name:  (null)
number of ops:  25
compiled vars:  !0 = $arr, !1 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   FETCH_CONSTANT                                   ~2      'Red'
          1        INIT_ARRAY                                       ~3      ~2, 0
          2        FETCH_CONSTANT                                   ~4      'Steel'
          3        ADD_ARRAY_ELEMENT                                ~3      ~4, 1
          4        INIT_ARRAY                                       ~5      ~3, 0
    4     5        FETCH_CONSTANT                                   ~6      'Red'
          6        INIT_ARRAY                                       ~7      ~6, 0
          7        FETCH_CONSTANT                                   ~8      'Wood'
          8        ADD_ARRAY_ELEMENT                                ~7      ~8, 1
          9        ADD_ARRAY_ELEMENT                                ~5      ~7, 1
    5    10        FETCH_CONSTANT                                   ~9      'Blue'
         11        INIT_ARRAY                                       ~10     ~9, 0
         12        FETCH_CONSTANT                                   ~11     'Wood'
         13        ADD_ARRAY_ELEMENT                                ~10     ~11, 1
         14        ADD_ARRAY_ELEMENT                                ~5      ~10, 2
    3    15        ASSIGN                                                   !0, ~5
    7    16        INIT_FCALL                                               'array_column'
         17        SEND_VAR                                                 !0
         18        SEND_VAL                                                 0
         19        DO_ICALL                                         $13     
         20        ASSIGN                                                   !1, $13
         21        INIT_FCALL                                               'print_r'
         22        SEND_VAR                                                 !1
         23        DO_ICALL                                                 
         24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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