PHP implements sorting of a key in a two-dimensional array. php two-dimensional array

PHP implements sorting of a key in a two-dimensional array. php two-dimensional array

This example describes how PHP sorts keys in a two-dimensional array. We will share this with you for your reference. The details are as follows:

/*** Sort the query result set * @ access public * @ param array $ list query result * @ param string $ field name * @ param string $ sortby sorting type (asc forward sorting desc reverse sorting nat natural sorting) * @ return array */function list_sort_by ($ list, $ field, $ sortby = 'asc ') {if (is_array ($ list )) {$ refer = $ resultSet = array (); foreach ($ list as $ I => $ data) {$ refer [$ I] = & $ data [$ field];} switch ($ sortby) {case 'asc ': // asort ($ refer); break; c Ase 'desc': // reverse sorting arsort ($ refer); break; case 'nat ': // natural sorting natcasesort ($ refer); break ;} foreach ($ refer as $ key => $ val) {$ resultSet [] = & $ list [$ key];} return $ resultSet;} return false ;} /*** example *: sort the IDs of two-dimensional arrays in descending order (that is, the bigger the IDs, the more advanced )? */$ List = array (0 => array ('id' => 1, 'name' => '1 '), 1 => array ('id' => 3, 'name' => '3'), 2 => array ('id' => 2, 'name' => '2'), 3 => array ('id' => 4, 'name' => '4 '),); // Answer $ new_list = list_sort_by ($ list, 'id', 'desc'); print_r ($ new_list );

The running result is as follows:

Array ([0] => Array ([id] => 4 [name] => fourth) [1] => Array ([id] => 3 [name] => third) [2] => Array ([id] => 2 [name] => second) [3] => Array ([id] => 1 [name] => first ))