Sort multidimensional array by multiple keys in PHP

The array_multisort function can be used to sort a multidimensional array based on multiple keys −

Example

$my_list = array(    array('ID' => 1, 'title' => 'data one', 'event_type' => 'one'),    array('ID' => 2, 'title' => 'data two', 'event_type' => 'zero'),    array('ID' => 3, 'title' => 'data three', 'event_type' => 'one'),    array('ID' => 4, 'title' => 'data four', 'event_type' => 'zero') ); # The list of sorted columns and their data can be obtained. This will be passed to the array_multisort function. $sort = array(); foreach($my_list as $k=>$v) {    $sort['title'][$k] = $v['title'];    $sort['event_type'][$k] = $v['event_type']; } # It is sorted by event_type in descending order and the title is sorted in ascending order. array_multisort($sort['event_type'], SORT_DESC, $sort['title'], SORT_ASC,$my_list);

For PHP version 5.5.0 −

array_multisort(array_column($my_list, 'event_type'), SORT_DESC, array_column($my_list, 'title'), SORT_ASC, $my_list);

Output

This will produce the following output −

array (    0 =>    array (       'ID' => 4,       'title' => 'data four',       'event_type' => 'zero',    ),    1 =>    array (       'ID' => 3,       'title' => 'data two',       'event_type' => 'zero',    ),    2 =>    array (       'ID' => 1,       'title' => 'data one',       'event_type' => 'one',    ),    3 =>    array (       'ID' => 2,       'title' => 'data three',       'event_type' => 'one',    ), )