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<?php class ColumnKeyClass { function __toString() { return 'first_name'; } } class IndexKeyClass { function __toString() { return 'id'; } } $column_key = new ColumnKeyClass(); $index_key = new IndexKeyClass(); $records = array( array( 'id' => 2135, 'first_name' => 'John', 'last_name' => 'XXX' ), array( 'id' => 3245, 'first_name' => 'Sally', 'last_name' => 'Smith' )); var_dump($column_key); var_dump($index_key); $firstNames = array_column($records, $column_key, $index_key); print_r($firstNames); var_dump($column_key); var_dump($index_key);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lQqh2
function name:  (null)
number of ops:  31
compiled vars:  !0 = $column_key, !1 = $index_key, !2 = $records, !3 = $firstNames
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   DECLARE_CLASS                                            'columnkeyclass'
    3     1        DECLARE_CLASS                                            'indexkeyclass'
    4     2        NEW                                              $4      'ColumnKeyClass'
          3        DO_FCALL                                      0          
          4        ASSIGN                                                   !0, $4
    5     5        NEW                                              $7      'IndexKeyClass'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !1, $7
    7     8        ASSIGN                                                   !2, <array>
   19     9        INIT_FCALL                                               'var_dump'
         10        SEND_VAR                                                 !0
         11        DO_ICALL                                                 
         12        INIT_FCALL                                               'var_dump'
         13        SEND_VAR                                                 !1
         14        DO_ICALL                                                 
   20    15        INIT_FCALL                                               'array_column'
         16        SEND_VAR                                                 !2
         17        SEND_VAR                                                 !0
         18        SEND_VAR                                                 !1
         19        DO_ICALL                                         $13     
         20        ASSIGN                                                   !3, $13
   21    21        INIT_FCALL                                               'print_r'
         22        SEND_VAR                                                 !3
         23        DO_ICALL                                                 
   22    24        INIT_FCALL                                               'var_dump'
         25        SEND_VAR                                                 !0
         26        DO_ICALL                                                 
         27        INIT_FCALL                                               'var_dump'
         28        SEND_VAR                                                 !1
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Class ColumnKeyClass:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lQqh2
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E > > RETURN                                                   'first_name'
          1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function __tostring

End of class ColumnKeyClass.

Class IndexKeyClass:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lQqh2
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E > > RETURN                                                   'id'
          1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function __tostring

End of class IndexKeyClass.

Generated using Vulcan Logic Dumper, using php 8.0.0


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