PHP array_column function

PHP array_chunk() function
PHP array_combine function

The PHP array_column function returns the values from the specified column of an associative array.
Considering the keys as the columns of the associative array, the array_column function is used to get the values of a single column (key) of the array.

What is the syntax of the array_column function?

array_column(array, column_key, index_key)
ParametersDetails
arrayRequired. Specify the associative array. You can also use objects from PHP 7.0
column_keyRequired. It can be a string or integer. When it’s an integer it specifies the index of the column to return its values. When it’s a string, it points towards the values of that key. It can also be NULL to reindex an indexed array.
index_keyOptional. The column to use as the index/keys for the resultant array
array_column function in PHP

Examples of the array_column function

<?php
// An example array
$arr = array(
  array(
    'name' => John,
    'gender' => 'Male',
    'age' => '24',
  ),
 array(
    'name' => Peter,
    'gender' => 'Male',
    'age' => '25',
  ),
 array(
    'name' => Tim,
    'gender' => 'Female',
    'age' => '39',
  ));

$ages = array_column($arr, 'age', 'name');
print_r($ages);
?>

In the above example, we fetch the column values age column values along with their names.

// Output
Array
(
  [John] => 24
  [Peter] => 25
  [Tim] => 39
)
<?php
// An example array
$arr = array(
  array(
    'name' => John,
    'gender' => 'Male',
    'age' => '24',
  ),
 array(
    'name' => Peter,
    'gender' => 'Male',
    'age' => '25',
  ),
 array(
    'name' => Tim,
    'gender' => 'Female',
    'age' => '39',
  ));

$names = array_column($arr, 'name');
print_r($names);
?>

In the above example, we fetch the names from the array only.

// Output
Array
(
  [0] => 24
  [1] => 25
  [2] => 39
)

For a more in-depth explanation see the official PHP reference.

PHP array_chunk() function
PHP array_combine function
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