/******************************************************************* 

 * This function sort a multi dimensional array by key, order, type.

 * 

 * @param array &$data referenz of a multi dimensional array

 * @param string $keys sort by key name

 * @param string $order order type (ASC|DESC)

 * @param integer $type compare type (0..4)

 * @return void

 *******************************************************************/

function msort ( &$data, $keys = 0, $order = "ASC", $type = 0 ) {

// Get the compare type

switch($type) {

	case 1: // Case insensitive natural

		$compare = 'strcasenatcmp'; break;

	case 2: // Case sensitive natural

		$compare = 'strnatcmp'; break;

	case 3: // Case sensitive string

		$compare = 'strcmp'; break;

	case 4: // Case insensitive string

		$compare = 'strcasecmp'; break;

	default: // Default: Numeric

		$compare = Null; break;

}

// Get the order type (ASC|DESC)

if ( $order == "DESC" ) { // DESC:  >

	if ( isset($compare) )

		(string) $body = $compare.'( $b['.$keys.'], $a['.$keys.'] )';

	else

		(string) $body = '$b['.$keys.'] - $a['.$keys.']';

} else { // ASC: <

	if ( isset($compare) )

		(string) $body = $compare.'( $a['.$keys.'], $b['.$keys.'] )';

	else

		(string) $body = '$a['.$keys.'] - $b['.$keys.']';

}

// Sort the array data by a defined user function

uasort( $data, create_function( '$a, $b', 'return ('.$body.');' ) );

}

// @example

$arr = array ( 10 => array('id' => 'dix',  'aa' => '1010'),

                100 => array('id' => 'cent', 'aa' => '100100'),

                  2 => array('id' => 'deux', 'aa' => '22'),

                  7 => array('id' => 'sept', 'aa' => '77'));

header( 'Content-Type: text/plain' );

print_r( msort( $arr, 'id', 'ASC', 3 ) );