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背景和需求

就好比說頁面導航的左側是分類，分類下面有很多鏈接。我現在想統計所有分類下面點擊次數最多的一個，并把其顏色做特殊處理！

大致的數據結構如下：

{
  "content": [
    {
      "id": "1",
      "name": "htmldrive",
      "url": "http://www.htmldrive.net/",
      "cate": "前端開發",
      "clickpoint": "100"
    },
    {
      "id": "2",
      "name": "17素材網",
      "url": "http://www.17sucai.com/",
      "cate": "前端開發",
      "clickpoint": "151"
    },
    {
      "id": "3",
      "name": "阿里媽媽圖標庫",
      "url": "http://www.iconfont.cn/",
      "cate": "前端開發",
      "clickpoint": "2"
    },
    {
      "id": "53",
      "name": "Animate.css",
      "url": "http://www.haorooms.com/uploads/example/Animatecss/",
      "cate": "前端開發",
      "clickpoint": "21"
    },
    {
      "id": "55",
      "name": "Dafont",
      "url": "http://www.dafont.com/",
      "cate": "字體",
      "clickpoint": "1"
    }
 ]
}

方法和思路

最好的處理方式是在后端PHP中對齊進行處理。

思路：我們可以創建一個新的過渡數組，對原來的數組進行循環，創建一個分類的數組，然后把點擊次數中的最大值和ID放到這個數組中。通過比較，獲取分類中點擊次數最多的ID和點擊次數，然后把這個次數最多的ID放在一個新的數組中，循環原來的數據，通過inarray(),函數判斷次數最多的ID是不是在這個數組當中，是的話，就給數據增加一個標示字段1，不是的話就是0。那么標示字段為1的就是分類中點擊次數最多的。

調整之后輸出的json是：

 {
    "content": [
      {
        "id": "1",
        "name": "htmldrive",
        "url": "http://www.htmldrive.net/",
        "cate": "前端開發",
        "clickpoint": "100",
       "max": 0
      },
      {
        "id": "2",
        "name": "17素材網",
        "url": "http://www.17sucai.com/",
        "cate": "前端開發",
        "clickpoint": "151",
        "max": 1
      },
      {
        "id": "3",
        "name": "阿里媽媽圖標庫",
        "url": "http://www.iconfont.cn/",
        "cate": "前端開發",
        "clickpoint": "2",
        "max": 0
      },
      {
        "id": "53",
        "name": "Animate.css",
        "url": "http://www.haorooms.com/uploads/example/Animatecss/",
        "cate": "前端開發",
        "clickpoint": "21",
        "max": 0
      },
      {
        "id": "55",
        "name": "Dafont",
        "url": "http://www.dafont.com/",
        "cate": "字體",
        "clickpoint": "1",
        "max": 0
      }
   ]
  }

php的代碼如下：

  $sql = "select id,name,url,cate,clickpoint from commonwebsite order by id asc ";
  $res= $db->getAll($sql);
  $temp_arr = array();
  foreach ($res as $key => $value) {
  if(!isset($temp_arr[$value['cate']])){
   $temp_arr[$value['cate']] = array();
   $temp_arr[$value['cate']]['max'] = $value['clickpoint'];
   $temp_arr[$value['cate']]['id'] = $value['id'];
  }else{
   if($value['clickpoint']>$temp_arr[$value['cate']]['max']){
    $temp_arr[$value['cate']]['max'] = $value['clickpoint'];
    $temp_arr[$value['cate']]['id'] = $value['id'];
   }
  }
  }
 $temp_id = array(); //創建一個存放ID的臨時數組
  foreach ($temp_arr as $val) {//循環之前創建的臨時數組，存放分類和最多點擊次數的
  $temp_id[] = $val['id']; //將點擊次數最多的ID賦值給了臨時數組
  }
   foreach ($res as $key => $vals) { //循環原來的數據
   if(in_array($vals['id'], $temp_id)){//如果次數最多的ID在原來的數組的ID中，那個加一個字段max并設置其值為1
    $res[$key]['max'] =1;
   }else{
    $res[$key]['max'] =0;//否則不是點擊次數最多的，設置為0
   }
  }
  $result['content'] = $res;
    die(json_encode($result)); //json輸出
  exit();