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<?php $records = array( array( 'id' => 2135, 'first_name' => 'John', 'last_name' => 'Doe' ), array( 'id' => -1, 'first_name' => 'Sally', 'last_name' => 'Smith' ), array( 'id' => -2, 'first_name' => 'Jane', 'last_name' => 'Jones' ), ); $firstNames = array_column($records, 'first_name', 'id'); print_r($firstNames);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/EQEL8
function name:  (null)
number of ops:  11
compiled vars:  !0 = $records, !1 = $firstNames
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                       !0, <array>
   20     1        INIT_FCALL                                                   'array_column'
          2        SEND_VAR                                                     !0
          3        SEND_VAL                                                     'first_name'
          4        SEND_VAL                                                     'id'
          5        DO_ICALL                                             $3      
          6        ASSIGN                                                       !1, $3
   21     7        INIT_FCALL                                                   'print_r'
          8        SEND_VAR                                                     !1
          9        DO_ICALL                                                     
         10      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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