如何按降序对关联数组进行排序？

Question

I know about rsort and array_reverse but I'd like to know how you could reverse all elements of an associative array as well as their index numbers. eg:

Take $age = array("x"=>"35", "y"=>"45", "z"=>"55");

and display it as

z 55

y 45

x 35

I tried this but it doesn't show what I want:

$age = array("x"=>"35", "y"=>"45", "z"=>"55");
array_reverse($age);
foreach($age as $x => $x_value){
    echo $x . " " . $x_value;
    echo "<br>";
}

Answer 1

I think you want to sort by key in decending order so you need to do flowing.Because array_reverse() function swap key with value in an array.

$age = array("x"=>"35", "y"=>"45", "z"=>"55");
krsort($age);
foreach($age as $x => $x_value){
 echo $x . " " . $x_value;
echo "<br>";
}