快看！这是一道送分算法题，基础数组字符串排序问题

$chars = ["yytyts", "abcabccaa", "uuuxyy", "mommentem", "aaaaaaaaaaaa"];

function sortArray($chars)
{
    $keys = [];
    foreach ($chars as $k => $str) {
        $str = str_split($str);
        $counts = array_count_values($str);
        arsort($counts);

        foreach ($counts as $key2 => $count) {
            $counts[$key2] = sprintf("%'.010d", $count);
        }

        $keys[$k] = implode('-', $counts);
    }

    arsort($keys);

    $new_chars = [];
    foreach ($keys as $key => $v) {
        $new_chars[] = $chars[$key];
    }

    return $new_chars;
}

print_r(sortArray($chars));Copy

<?phpCopy

<?php
/**
 * Created by PhpStorm.
 * User: wangqingxian
 * Date: 2017/8/1
 * Time: 上午11:04
 */
function sortArray()
{
    $arr = ['aaaaaaaaa',"yytyts", "abcabccaa", "uuuxyy", "mommentem"];
    $str_count = [];
    foreach ($arr as $key => $val)
    {
        $len = strlen($val);
        for ($i = 0; $i < $len; $i++)
        {
            if (!isset($str_count[$val][$val[$i]]))
            {
                $str_count[$val][$val[$i]] = substr_count($val, $val[$i]);
            }
        }
        $str_count[$val] = max($str_count[$val]);
    }
    arsort($str_count, SORT_NUMERIC);

    return array_keys($str_count);
}

//["abcabccaa", "mommentem", "yytyts", "uuuxyy"]
$arr = sortArray();
print_r($arr);
Copy

function getCharValue(str) {
    let hash = {};
    let arr = [];
    for(let i=0; i<str.length; i++) {
        let v = str[i];
        hash[v] = hash[v] === undefined ? 1 : hash[v] + 1
    }
    for(let key in hash) {
        arr.push({
            key: key,
            value: hash[key]
        }); 
    }

    let ret = [];
    arr.sort(function(a, b) {
        return a.value < b.value;
    }).forEach(function(item) {
        ret.push(item.value);
    });  
    return ret;
}

function sortArray(strings) {
    let arr = [];
    for(let k in strings) {
        let v = strings[k];
        arr.push({
            key: v,
            value: getCharValue(v)
        })
    }

    let ret = [];
    arr.sort(function(a, b) {
        a = a.value;
        b = b.value;
        let lena = a.length;
        let lenb = b.length;
        let n = lena < lenb ? lena : lenb;

        for(let i=0; i<n; i++) {
            if(a[i] < b[i]) {
                return true;
            }
            else if(a[i] > b[i]) {
                return false;
            }
        }
        return lena == n ? false : true;
    }).forEach(function(item) {
        ret.push(item.key);
    });
    return ret;
}

let strings = ["yytyts", "abcabccaa", "uuuxyy", "mommentem", "aaaaaaaaaaaa"];
console.log( sortArray(strings) );Copy

$arr = ["yytyts", "abcabccaa", "uuuxyy", "mommentem"];

$map = [];
foreach($arr as $val) {
    $strArr = str_split($val);
    $charMap = array_count_values($strArr);
    arsort($charMap);
    $map[] = array('str'=>$val,'sortDesc' => array_values($charMap));
}

usort($map,'mySort');

$dstArr = array_column($map, 'str');
var_dump($dstArr);

function mySort($c, $d){
    $a = $c['sortDesc'];
    $b = $d['sortDesc'];
    if($a[0] > $b[0]) {
        return -1;
    }
    else if($a[0] == $b[0]){
        if($a[1] > $b[1]){
            return -1;
        }
        elseif($a[1] == $b[1]){
            return 0;
        }
        else{
            return 1;
        }
    }
    else{
        return 1;
    }
}Copy

$beforeStrs = ["yytyts", "abcabccaa", "uuuxyy", "mommentem"];
$sortArrayLists = [];
$sort1 = [];
$sort2 = [];
foreach ($beforeStrs as $key=>$beforeStr) {
  $_lists['str'] = $beforeStr;
  $valuesCount = array_count_values(str_split($beforeStr));
  arsort($valuesCount);
  $maxValuesCount = current($valuesCount);
  $sort1[] = $maxValuesCount;
  $_lists['max_value_cont'] = $maxValuesCount;
  $_lists['before_index'] = $key;
  $sortArrayLists[] = $_lists;
  $sort2[] = $key;
}
array_multisort($sort1, SORT_DESC, $sort2, SORT_ASC, $sortArrayLists);
$afterStrs = array_column($sortArrayLists,'str');
print_r($afterStrs);Copy

Array ( [0] => abcabccaa [1] => mommentem [2] => yytyts [3] => uuuxyy )Copy