array_column()

The array_column() function returns the values from a single column in the input array.

Syntax

array_column(array, column_key, index_key)

• array: A multi-dimensional array to use.
• column_key: An integer or string key of the column of values to return. It may also be null to return complete arrays or objects.
• index_key: The column to use as the index for the returned array.

Example

In this example, the first_name keys are returned using the array_column() method.

<?php
  $a = array(
  array(
    'id' => 362,
    'first_name' => 'Jane',
    'last_name' => 'Doe',
  ),
  array(
    'id' => 921,
    'first_name' => 'Lois',
    'last_name' => 'Griffin',
  ),
  array(
    'id' => 475,
    'first_name' => 'Lola',
    'last_name' => 'Bunny',
  )
);

$first_names = array_column($a, 'first_name');
print_r($first_names);
?>

The output looks like this:

Array
(
  [0] => Jane
  [1] => Lois
  [2] => Lola
)

Additionally, the returned values can be indexed by the id column:

<?php
$first_names = array_column($a, 'first_name', 'id');
print_r($first_names);
?>

The output looks like this:

Array
(
  [362] => Jane
  [475] => Lola
  [921] => Lois
)

Codebyte Example

The following codebyte example is runnable and utilizes the array_column() method.

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