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PDO的rowCount()
方法總是返回零值,即使存在的結果,根據:PDO的rowCout()總是爲零
count($sth->fetch(PDO::FETCH_ASSOC)) > 1
Fromt此PHP代碼:
$_user = "a";
$_pass = "b";
$query = "select user,password from login where user = :user and password = :pass";
$conn = new PDO("sqlite:" .Config::$db_file);
$conn->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
$sth = $conn->prepare($query);
$sth->bindParam(':user', $_user);
$sth->bindParam(':pass', $_pass);
$sth->execute();
$result = $sth->fetch(PDO::FETCH_ASSOC);
echo "rowCount() = ",$sth->rowCount(),"\n";
echo 'count($result) = ', count($result), "\n";
print_r($result);
我得到:
rowCount() = 0 count($result) = 2 Array ([user] => a [password] => b)
如何解決這個問題?
從文檔引用:如果由關聯的PDOStatement執行的最後一條SQL語句是SELECT語句,則某些數據庫可能會返回該語句返回的行數。但是,不能保證所有數據庫的這種行爲,並且不應該依賴便攜式應用程序。 – Maerlyn
Downvotes - 解釋? – Jack
(不是我,但)可能是因爲這在手冊中有明確的解釋。 – Maerlyn