array_column() function in php

array_column() function in php

PHP Array Reference Manual

Get the last_name column from the recordset:

 5698,
    'first_name' => 'Peter',
    'last_name' => 'Griffin',
  ),
  array(
    'id' => 4767,
    'first_name' => 'Ben',
    'last_name' => 'Smith',
  ),
  array(
    'id' => 3809,
    'first_name' => 'Joe',
    'last_name' => 'Doe',
  )
);
$last_names = array_column($a, 'last_name');
print_r($last_names);
?>

Output:

Array
(
  [0] => Griffin
  [1] => Smith
  [2] => Doe
)

Definition and usage

array_column() Returns the value of a single column in the input array.

Syntax

array_column(array,column_key,index_key);

Parameters

Description

array Required. Specifies the multidimensional array (record set) to use.

column_key Required. The column whose value needs to be returned. Can be an integer index of a column of an index array, or a string key value of a column of an associative array. This parameter can also be NULL, in which case the entire array will be returned (very useful when used with the index_key parameter to reset the array key).

index_key Optional. The column that is the index/key of the returned array.

Technical details

Return value:

Returns an array whose value is the value of a single column in the input array.

Get the last_name column from the record set and use the corresponding "id" column as the key value:

 5698,
    'first_name' => 'Peter',
    'last_name' => 'Griffin',
  ),
  array(
    'id' => 4767,
    'first_name' => 'Ben',
    'last_name' => 'Smith',
  ),
  array(
    'id' => 3809,
    'first_name' => 'Joe',
    'last_name' => 'Doe',
  )
);
$last_names = array_column($a, 'last_name', 'id');
print_r($last_names);
?>

Output:

Array
(
  [5698] => Griffin
  [4767] => Smith
  [3809] => Doe
)

Complete PHP Array Reference Manual

The above is the detailed content of array_column() function in php. For more information, please follow other related articles on the PHP Chinese website!