PHP中数组值的排名/位置 [英] Ranking/Position on value of array in PHP

问题描述

我有一个具有这些值的数组， Array（[0] => 12 [1] => 17 [2] => 5 [3] => 27 [4] => 5），我需要找出每个值
的排名/位置，即

I have an array with these values, Array ( [0] => 12 [1] => 17 [2] => 5 [3] => 27 [4] => 5 ) and I need to find out ranking/position of each value ie,

for 27 - Rank 1 
for 17 - Rank 2 
for 12 - Rank 3 
for 5 - Rank 4 
for 5 - Rank 4 (duplicate value in the array) 

这些必须与数组顺序相同，因此输出应为

and these need to be in the same order as the array, so that output should be as follow

12 - Rank 3 
17 - Rank 2 
5 - Rank 4 
27 - Rank 1 
5 - Rank 4 

推荐答案

这应该起作用（包括具有相同等级的重复值）：

This should work (including duplicate values having the same rank):

$values = array();
$values[0] = 5;
$values[1] = 12;
$values[2] = 19;
$values[3] = 9;
$values[4] = 5;

$ordered_values = $values;
rsort($ordered_values);

foreach ($values as $key => $value) {
    foreach ($ordered_values as $ordered_key => $ordered_value) {
        if ($value === $ordered_value) {
            $key = $ordered_key;
            break;
        }
    }
    echo $value . '- Rank: ' . ((int) $key + 1) . '<br/>';
}

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