dsdsm2016 2015-06-22 13:30
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PHP - PDO,如何返回select语句中的行数

I have a simple statement but cant seem to get the number of rows from the select statement, really bugging me when its really simple. I keep getting empty string.

Here is the code

include "connect.php";

$userID = $_POST['userID'];
$threadID = $_POST['threadID'];

$sql1 = "select * from AT_AddThread where AT_ID = :threadID";
$stmt = $conn->prepare($sql1);
$stmt->execute(array(':threadID' => $threadID));
$result = $stmt->fetchColumn(7);
//echo $result;

$sql2 = "select * from TJ_ThreadJoined where TJ_T_ID = :threadID"
$q2 = $conn->prepare($sql2);
$q2->execute(array(':threadID' => $threadID));
$q2->execute();
$rows = $q2->fetchColumn();
echo $rows; //THIS IS where i want to return the number of rows from the select statement
  • 写回答

3条回答 默认 最新

  • douyi6818 2015-06-22 14:00
    关注

    In addition to fetchColumn you can try the following ways:

    1. count the rows

      $rows = $stmt->fetchAll(); echo "count = " . count($rows);

    2. Use rowCount()

      echo "count = " . $stmt->rowCount();

    3. Add it to the query :

      SELECT COUNT(*) as rowCount ...

      echo $row['rowCount'];

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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