return 具有 PHP 的多个值(变量)

return multiple values (variables) with PHP

你好,我正在开发一个函数,它应该 return 数据库结果集以及查询检索数据所花费的时间。效果很好,但我不知道如何 return 时间和结果集并使它们在视图中可用。感谢您的帮助。

我的代码如下所示:

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 i return 中结果集如下:

<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>

您需要 return 一个数组。也许只是将其添加到 $row。另外,您需要在查询之前获取开始时间并在查询之后获取结束时间:

   //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,您可以将它添加到一个对象变量中:

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

然后访问:

   $timeResults = $resultsProvider->duration;

太没经验了。我使用了另一个函数来获取持续时间。但是给出的其他答案有很大帮助。谢谢,这里是最终代码:

/* 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;
}