YouTipPHP array_column() Function
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PHP array_column() Function
Example
Extract the last_name column from the recordset:
<?php
// Possibly 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
(
=> Griffin
=> Smith
=> 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 | Description |
|---|---|
| array | Required. Specifies the multidimensional array (recordset) to use. |
| column_key | Required. The column of values to return. This value may be the integer key of the column you wish to retrieve, or the string key name for an associative array. It may also be NULL, in which case the entire array will be returned (useful in combination with index_key to reindex the array). |
| index_key | Optional. The column to use as the keys/indexes for the returned array. |
Technical Details
| Return Value: | Returns an array of values representing a single column from the input array. |
|---|---|
| PHP Version: | 5.5+ |
More Examples
Example 1
Extract the last_name column from the recordset, using the corresponding "id" column as the keys:
<?php
// Possibly 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
(
=> Griffin
=> Smith
=> Doe
)