wp_list_pluck
$foods = array( array( 'name' => 'Banana', 'color' => 'Yellow', ), array( 'name' => 'Apple', 'color' => 'Red', ) ); $food_names = wp_list_pluck( $foods, 'name' ); print_r($food_names); // [ 'Banana', 'Apple']
Source: developer.wordpress.org