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<?php class ColumnKeyClass { function __toString() { return 'first_name'; } } class IndexKeyClass { function __toString() { return 'id'; } } class ValueClass { function __toString() { return '2135'; } } $column_key = new ColumnKeyClass(); $index_key = new IndexKeyClass(); $value = new ValueClass(); // Array representing a possible record set returned from a database $records = array( array( 'id' => $value, 'first_name' => 'John', 'last_name' => 'XXX' ), array( 'id' => 3245, 'first_name' => 'Sally', 'last_name' => 'Smith' ), ); var_dump($column_key); var_dump($index_key); var_dump($value); var_dump($records[0]['id']); $firstNames = array_column($records, $column_key, $index_key); print_r($firstNames); var_dump($column_key); var_dump($index_key); var_dump($value); var_dump($records[0]['id']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1uMqh
function name:  (null)
number of ops:  56
compiled vars:  !0 = $column_key, !1 = $index_key, !2 = $value, !3 = $records, !4 = $firstNames
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   DECLARE_CLASS                                            'columnkeyclass'
    6     1        DECLARE_CLASS                                            'indexkeyclass'
   10     2        DECLARE_CLASS                                            'valueclass'
   15     3        NEW                                              $5      'ColumnKeyClass'
          4        DO_FCALL                                      0          
          5        ASSIGN                                                   !0, $5
   16     6        NEW                                              $8      'IndexKeyClass'
          7        DO_FCALL                                      0          
          8        ASSIGN                                                   !1, $8
   17     9        NEW                                              $11     'ValueClass'
         10        DO_FCALL                                      0          
         11        ASSIGN                                                   !2, $11
   23    12        INIT_ARRAY                                       ~14     !2, 'id'
   24    13        ADD_ARRAY_ELEMENT                                ~14     'John', 'first_name'
   25    14        ADD_ARRAY_ELEMENT                                ~14     'XXX', 'last_name'
         15        INIT_ARRAY                                       ~15     ~14
   23    16        ADD_ARRAY_ELEMENT                                ~15     <array>
   21    17        ASSIGN                                                   !3, ~15
   34    18        INIT_FCALL                                               'var_dump'
         19        SEND_VAR                                                 !0
         20        DO_ICALL                                                 
   35    21        INIT_FCALL                                               'var_dump'
         22        SEND_VAR                                                 !1
         23        DO_ICALL                                                 
   36    24        INIT_FCALL                                               'var_dump'
         25        SEND_VAR                                                 !2
         26        DO_ICALL                                                 
   37    27        INIT_FCALL                                               'var_dump'
         28        FETCH_DIM_R                                      ~20     !3, 0
         29        FETCH_DIM_R                                      ~21     ~20, 'id'
         30        SEND_VAL                                                 ~21
         31        DO_ICALL                                                 
   38    32        INIT_FCALL                                               'array_column'
         33        SEND_VAR                                                 !3
         34        SEND_VAR                                                 !0
         35        SEND_VAR                                                 !1
         36        DO_ICALL                                         $23     
         37        ASSIGN                                                   !4, $23
   39    38        INIT_FCALL                                               'print_r'
         39        SEND_VAR                                                 !4
         40        DO_ICALL                                                 
   40    41        INIT_FCALL                                               'var_dump'
         42        SEND_VAR                                                 !0
         43        DO_ICALL                                                 
   41    44        INIT_FCALL                                               'var_dump'
         45        SEND_VAR                                                 !1
         46        DO_ICALL                                                 
   42    47        INIT_FCALL                                               'var_dump'
         48        SEND_VAR                                                 !2
         49        DO_ICALL                                                 
   43    50        INIT_FCALL                                               'var_dump'
         51        FETCH_DIM_R                                      ~29     !3, 0
         52        FETCH_DIM_R                                      ~30     ~29, 'id'
         53        SEND_VAL                                                 ~30
         54        DO_ICALL                                                 
         55      > RETURN                                                   1

Class ColumnKeyClass:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1uMqh
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     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/1uMqh
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E > > RETURN                                                   'id'
          1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function __tostring

End of class IndexKeyClass.

Class ValueClass:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1uMqh
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E > > RETURN                                                   '2135'
          1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function __tostring

End of class ValueClass.

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