Question

我是php的新手。

当我print_r($documents)时，系统将显示：

数组（[0] =＆gt; stdClass对象（[id] =＆gt; 1 [标题] =＆gt;“AAA”[摘要] =＆gt; blablabla [得分] =＆gt; 100 [主题] =＆gt;技术）[1] =＆gt; stdClass对象（[id] =＆gt; 2 [title] =＆gt;“BBB”[summary] =＆gt; blablabla [得分] =＆gt; 86 [主题] =＆gt;食物）[ 2] =＆gt; stdClass对象（[id] =＆gt; 3 [title] =＆gt;“CCC”[summary] =＆gt; blablabla [得分] =＆gt; 45 [主题] =＆gt;技术）[3] = ＆gt; stdClass对象（[id] =＆gt; 4 [title] =＆gt;“DDD”[summary] =＆gt; blablabla [得分] =＆gt; 67 [主题] =＆gt;技术）[4] =＆gt; stdClass对象（[id] =＆gt; 5 [title] =＆gt;“EEE”[summary] =＆gt; blablabla [得分] =＆gt; 88 [主题] =＆gt;技术））

我想计算'主题'并在该对象上找到最高'得分'，所以我有一个结果：

主题“技术”= 4个文件

主题“食物”= 1份文件

文件“AAA”中的最高分= 100

foreach功能怎么办？

foreach($documents as $data)
{
    $id = $data->id;
    $title = $data->title;
    $score = $data->score;
    $topic = $data->topic;
}

感谢您的帮助。

Answer 1

$top   = $documents[0]; // top element (with max score, assume first one as default)
$group = array();       // group buffer to store document count

foreach($documents as $data){
   $topic = $data->topic;

   // if topic in group
   if(isset($group[$topic])){
       $group[$topic]++;   // add one document
   } else { // otherwise
       $group[$topic] = 1; // set one document
   }

   // if $tops's score value is lesser than current $data's value
   if($top->score < $data->score){
       $top = $data; // there is a new top.
   }
}

var_dump($group, $top);

您可以获取$top对象的任何属性。您还可以在$group数组中为每个主题分组。

从对象php中的数组计数数据

1 个答案: