how to rank array's index in PHP

Question

I need rank in my system. I have an array $arr = array(120,26,38,96,22);. I need to rank the index inside without changing their position.

The output I need is something like:

120 is rank 1, 26 is rank 4, 38 is rank 3, 96 is rank 2, 22 is rank 5

I've tried this, but all ranked as rank 1:

<?php
$arr = array(120,26,38,96,22);
$rank = 0;
$score=false;
$rows = 0;

foreach($arr as $sort){
    $rows++;
    if($score != $arr){
        $score = $arr;
        $rank = $rows;
    }echo $sort.' is rank '.$rank.'</br>';  
}
?>

And also I need the array length to be dynamic.

Answer 1

Here's one way:

$arr  = array(120,26,38,96,22);
$rank = $arr;
rsort($rank);

foreach($arr as $sort) {
    echo $sort. ' is rank ' . (array_search($sort, $rank) + 1) . '</br>';
}

• Copy the original array as $rank and sort in reverse so the keys will be the rank -1
• Loop the original array and search for that value in $rank returning the key (rank)
• Add 1 since keys start at 0

Or another possibility:

$arr  = array(120,26,38,96,22);
$rank = $arr;
rsort($rank);
$rank = array_flip($rank);

foreach($arr as $sort) {
    echo $sort . ' is rank '. ($rank[$sort] + 1) . '</br>';
}

• Copy the original array as $rank and sort in reverse so the keys will be the rank -1
• Flip the $rank array to get values as keys and rank as values
• Loop the original array and use the value as the $rank key to get the rank
• Add 1 since keys start at 0