1 <?php 2 $users = array( 3 array( 4 'name' => 'tom', 5 'age' => 20 6 ), 7 array( 8 'name' => 'anny', 9 'age' => 18 10 ), 11 array( 12 'name' => 'jack', 13 'age' => 22 14 ) 15 ); 16 $ages = array(); 17 foreach ($users as $user) { 18 $ages[] = $user['age']; 19 } 20 array_multisort($ages, SORT_DESC, $users); //SORT_DESC:降序---SORT_ASC:升序 21 print_r($users);