用PHP返回多个值(变量)

时间:2018-08-24 14:53:09

标签: php mysql database resultset multiple-resultsets

您好,我正在研究一个函数,该函数应该返回数据库结果集以及查询检索数据所用的时间。效果很好,但我不知道如何返回时间和结果集并使它们在视图中可用。感谢您的帮助。

我的代码如下:

public function getNumResults($term) {

   /* Count query Execution */
   $starttime = microtime(true);

   $query = $this->con->prepare("SELECT COUNT(*) as total
       FROM sites WHERE title LIKE :term
       OR url LIKE :term
       OR keywords LIKE :term
       OR description LIKE :term");

   $endtime = microtime(true);

   /* Calculates total time taken */
   $duration = $endtime - $starttime;

   $searchTerm = "%". $term . "%";
   $query->bindParam(":term", $searchTerm);
   $query->execute();

   $row = $query->fetch(PDO::FETCH_ASSOC);

   return $row["total"];

}

在视图中,我返回结果集,如下所示:

<div class="mainResultSection">
        <?php
          $resultsProvider = new SearchResultsProvider($con);
          $numResults = $resultsProvider->getNumResults($term);
          /* Not working */
          $timeResults = $resultsProvider->getNumResults($term)->duration;
          echo "<p class='resultsCount'>$numResults results found. In $timeResults <p>";
        ?>
      </div>

2 个答案:

答案 0 :(得分:1)

您需要返回一个数组。也许只需将其添加到$row中即可。另外,您需要获取查询之前的开始时间,并获取以下之后的结束时间:

   //other code

   $starttime = microtime(true);
   $query->execute();
   $endtime = microtime(true);
   $row = $query->fetch(PDO::FETCH_ASSOC);
   $row["duration"] = $endtime - $starttime;

   return $row;

或者对于您当前的代码,您可以将其添加到对象变量中:

   $this->duration = $endtime - $starttime;

然后访问:

   $timeResults = $resultsProvider->duration;

答案 1 :(得分:0)

经验不足。我使用另一个函数来获取持续时间。但是给出的其他答案很有帮助。谢谢,这里的最终代码有效:

/* Time to get results */
public function getTimeResult($term){
   $query = $this->con->prepare("SELECT COUNT(*) as total
        FROM sites WHERE title LIKE :term
        OR url LIKE :term
        OR keywords LIKE :term
        OR description LIKE :term"
   );

   $searchTerm = "%". $term . "%";
   $query->bindParam(":term", $searchTerm);

   $starttime = microtime(true);
   $query->execute();
   $endtime = microtime(true);

   /* Calculates total time taken */
   $duration = $endtime - $starttime;

   return $duration;
}