php method of sorting associative arrays by keys through ksort function

This article example describes the method of php sorting the associative array by key through the ksort() function. Share it for your reference. The specific analysis is as follows:

php sorts the associative arrays by keys through the ksort() function, and the ksort function sorts in the positive order of the key of the associative array. If you want to reverse order, you can do that krsort() function

$first = array("x"=>5,"a"=>2,"f"=>1);
ksort( $first );
foreach ( $first as $key => $val ) {
 print "$key = $val<br />";
}

I hope this article will be helpful to everyone's PHP programming.