問題描述
我找到了很多方法來使用 PDO 的 exec 語句，但我不確定它對我有幫助.我的理解是我必須對準備好的語句使用 execute() 函數.我正在使用來自用戶輸入的數據更新一行，因此我想使用準備好的語句而不是 query() 調用.
I have found many ways to use the exec statement for PDO, but I'm not sure it helps me. My understanding is that I have to use the execute() function for prepared statements. I am updating a row with data from user input, so I would like to use a prepared statement instead of the query() call.
我的代碼如下:
$dbh = buildDBConnector();
$sql = "UPDATE tb_users
SET authState=1
WHERE id = ? AND authPass = ?";
$q = $dbh->prepare($sql);
$f = $q->execute(array($id,$authPass));
if($f){
echo '<br />Success<br />';
}else{
echo '<br />Failure<br />';
}
問題是查詢本身沒有錯誤并且執行得很好，所以沒有存儲在 $f 中的失敗.但是，我需要知道它是否真的找到了要更新的行，然后成功更新了它.換句話說，我需要受影響的行.在谷歌搜索等時，它不斷出現 exec 語句，但據我所知， exec 不是用于準備好的語句?有什么建議嗎?
The issue is that the query itself is error free and executes fine, so there is no failure to store in $f. However, I need to know if it actually found the row to update, then successfully updated it. In other words, I need the affected rows. When googling and such, it keeps coming to the exec statement, but from my understanding, exec isn't for prepared statements? Any suggestions?
推薦答案
試試 $q->rowCount().準備好的語句將通過該方法返回受影響的行數.
Try $q->rowCount(). Prepared statements will return the number of affected rows via that method.
這篇關于PDO 是執行語句期間受影響的行的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！