The array_column() function

The array_column() function returns the values from a specific column in a multidimensional array. Optionally, you can specify a column to be used as keys for the new values.

EXAMPLE

// 1. DATA PREPARATION
// An array representing a set of records from a database (e.g., MySQL)
$employees = array(
    array(
        'id' => 32,
        'name' => 'First',
        'department' => 'administration',
    ),
    array(
        'id' => 15,
        'name' => 'Second',
        'department' => 'sales',
    ),
    array(
        'id' => 63,
        'name' => 'Third',
        'department' => 'procurement',
    ),
    array(
        'id' => 77,
        'name' => 'Fourth',
        'department' => 'warehouse',
    ),
    array(
        'id' => 3,
        'name' => 'Fifth',
        'department' => 'retail',
    )
);

echo "COLUMN OUTPUT WITH IDs (Departments as keys):\n\n";

// 2. FUNCTION USAGE
// First parameter: source array
// Second parameter: which column to extract
// Third parameter (optional): which column should become the keys in the new array
$output = array_column($employees, 'id', 'department');

print_r($output);

// TIP: This function is extremely fast for converting SQL results into simple lists.

RESULT

The result will be shown here...