Question

我有一个foreach循环，它将在我的数据库中进行搜索。我想获得搜索返回的总行数。

目前，我有这个：

foreach ($stmt as $row) {

    $search=$dbh->prepare("SELECT * FROM advertisement_clicks WHERE username=:username AND token=:token");
    $search->bindParam(":username",$userdata['id']);
    $search->bindParam(":token",$row['token']);
    $search->execute();
    echo $search->rowCount(); 

}

这将打印出来：00001100 - 我怎样才能得到它们的总结果？（在这种情况下，它将是2）

更好的是，如何在foreach循环中获得在之外的总结果？

循环外的代码是：

$stmt = $dbh->prepare("SELECT * FROM advertisements WHERE status='2' AND fixed='1' AND fixed_expire>:time AND membershipFilter='0'");
$stmt->bindParam(":time",time());
$stmt->execute();
$f=$stmt->rowCount();

Answer 1

您可以执行以下操作 -

$count = 0 ;

foreach ($stmt as $row) {

    $search=$dbh->prepare("SELECT * FROM advertisement_clicks WHERE username=:username AND token=:token");
    $search->bindParam(":username",$userdata['id']);
    $search->bindParam(":token",$row['token']);
    $search->execute();
    $count += $search->rowCount(); 

}

echo $count ;

Answer 2

通过像htis这样的变量来计算：

$total = 0;
foreach ($stmt as $row) {

    $search=$dbh->prepare("SELECT * FROM advertisement_clicks WHERE username=:username AND token=:token");
    $search->bindParam(":username",$userdata['id']);
    $search->bindParam(":token",$row['token']);
    $search->execute();
    $total +=  $search->rowCount(); 


}

$total将保留总值。

Answer 3

上述参与者都没有真正理解他们所写代码的含义:) 此外，rowCount永远不应该用于此目的，即使在这种特殊情况下数字不是那么高

$total  = 0;
$query  = "SELECT count(*) FROM advertisement_clicks 
           WHERE username=:username AND token=:token";
$search = $dbh->prepare($query);
$search->bindParam(":username", $userdata['id']);
$search->bindParam(":token",    $row['token']);

foreach ($stmt as $row) {
    $search->execute();
    $total += $search->fetchColumn(); 
}

必须是

此外，假设$ stmt是先前查询的结果，大多数情况下您可以通过使用GROUP BY运算符获取其他查询中的计数。 没有这样的额外循环

Answer 4

$x = 0;
foreach ($stmt as $row) {

$search=$dbh->prepare("SELECT * FROM advertisement_clicks WHERE username=:username AND token=:token");
   $search->bindParam(":username",$userdata['id']);
   $search->bindParam(":token",$row['token']);
   $search->execute();
   echo $search->rowCount(); 
   $x++;
}
echo $x;

php - 获取foreach中的结果总数

4 个答案: