PHP array_column() Function
Example
Extract the 'last_name' column from the record set:
<?php
// Indicates the array of possible records returned by the database
$a = array(
array(
'id' => 5698,
'first_name' => 'Bill',
'last_name' => 'Gates',
),
array(
'id' => 4767,
'first_name' => 'Steve',
'last_name' => 'Jobs',
),
array(
'id' => 3809,
'first_name' => 'Mark',
'last_name' => 'Zuckerberg',
)
);
$last_names = array_column($a, 'last_name');
print_r($last_names);
?>
Output:
Array ( [0] => Gates [1] => Jobs [2] => Zuckerberg )
Definition and Usage
array_column() returns the values of a single column from the input array.
Syntax
array_column(array,column_key,index_key);
| Parameter | Description |
|---|---|
| array | Mandatory. Specifies the multidimensional array (record set) to be used. |
| column_key |
Required. The column that needs to return the value. It can be an integer index of the column of an indexed array, or a string key value of the column of an associative array. This parameter can also be NULL, in which case the entire array will be returned (very useful when resetting the array keys with the index_key parameter). |
| index_key | Optional. Used as the index/key of the returned array. |
Technical Details
| Return Value: | Returns an array, the values of which are the values of a single column in the input array. |
| PHP Version: | 5.5+ |
More Examples
Example 1
Extract the 'last_name' column from the record set, using the corresponding 'id' column as the key value:
<?php
// Indicates the array of possible records returned by the database
$a = array(
array(
'id' => 5698,
'first_name' => 'Bill',
'last_name' => 'Gates',
),
array(
'id' => 4767,
'first_name' => 'Steve',
'last_name' => 'Jobs',
)
array(
'id' => 3809,
'first_name' => 'Mark',
'last_name' => 'Zuckerberg',
)
);
$last_names = array_column($a, 'last_name', 'id');
print_r($last_names);
?>
Output:
Array ( [5698] => Gates [4767] => Jobs [3809] => Zuckerberg )
