PHP array_column() Function
Example
Get column of last names from a recordset:
<?php
// An array that represents a possible record set returned from a database
$a = array(
array(
'id' => 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
The array_column() function returns the values from a single column in the input array.
Syntax
array_column(array, column_key, index_key)
Parameter Values
| Parameter | Description |
|---|---|
| array | Required. Specifies the multi-dimensional array (record-set) to use. As of PHP 7.0, this can also be an array of objects. |
| column_key | Required. An integer key or a string key name of the column of values to return. This parameter can also be NULL to return complete arrays (useful together with index_key to re-index the array) |
| index_key | Optional. The column to use as the index/keys for the returned array |
Technical Details
| Return Value: | Returns an array of values that represents a single column from the input array |
|---|---|
| PHP Version: | 5.5+ |
More Examples
Example
Get column of last names from a recordset, indexed by the "id" column:
<?php
// An array that represents a possible record set returned from a database
$a = array(
array(
'id' => 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
)
❮ PHP Array Reference
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