Php method for sorting arrays based on the size of a key value

This time for everyone to bring PHP according to the size of a key value array method, PHP according to the size of a key value of the array of considerations, the following is the actual case, together to see.

problem: sorting key values for a key of a given array

Workaround:

$a is a sorted array, $b is a collection of data to sort, $result is the final result $b = Array (' name ' = ' = '  Beijing ', ' nums ' = ' + '),  Array (' name ' = = ' Shanghai ', ' nums ', ' + ', '  array ' (' name ' = ' + ' guangzhou ', ' nums ' + ') '),  Array (' name ' = ' = ' shenzhen ', ' nums ' = ' 70 ')  ), $a = Array (), foreach ($b as $key = = $val) {  $a [] = $val [' nums '];//here to note $val[' nums '] cannot be empty, otherwise there will be a problem}//$ A first sorts rsort ($a), $a = array_flip ($a), $result = Array (), and foreach ($b as $k + = $v) {  $temp 1 = $v [' nums '];  $temp 2 = $a [$temp 1];  $result [$temp 2] = $v;} Here also to sort $result, Jian's position is not ksort ($result);//Then you want to see the results of Var_dump ($result);

Operation Result:

Array (4) {[0]=> Array (2) {  ["name"]=>  string (4) "Beijing"  ["Nums"]=>  string (3) "$"} [1]=> Array (2) {  ["name"]=>  string (4) "Guangzhou"  ["Nums"]=>  string (3) ""} [2]=> Array (2) {  [" Name "]=>  string (4)" Shanghai "  [" Nums "]=>  string (2)" a "} [3]=> Array (2) {  [" name "]=>  String (4) "Shenzhen"  ["Nums"]=>  string (2) "70"}}

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