PHP重新编号数组但保留序列

Question

I have an array like this:

array(13,4,7,1,16);

I want to recount the array, but I want to keep the sequence, like this:

array(4,2,3,1,5);

How can I do this?

Answer 1

if you want to get the index of the array with reference to the sorted values

Try this

 $numbers = array(13,4,7,1,16);
$numberscopy = $numbers;
sort($numberscopy);
$final = array();
//echo array_search(13, $numbers);
for($a=0 ; $a<count($numberscopy );$a++){

$final[] = array_search($numberscopy[$a], $numbers) + 1;
}
var_dump($final);