與PDO MySQL查詢問題

Question

出於某種原因，我的查詢不起作用，但它以前做過。

$stmt = $pdo->prepare('SELECT * FROM '.$table.' WHERE urlid = :used'); 
$stmt->execute(array(':used' => $fname)); 
$num = $stmt->rowCount(); 
if ($num == 1 OR $num > 1){ 

錯誤：

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE urlid = ?' at line 1' in /Applications/XAMPP/xamppfiles/htdocs/fbc/urlid.php:100 Stack trace: #0 /Applications/XAMPP/xamppfiles/htdocs/fbc/urlid.php(100): PDO->prepare('SELECT * FROM ...') #1 {main} thrown in /Applications/XAMPP/xamppfiles/htdocs/fbc/urlid.php on line 100

Answer 1

嘗試到您的SQL查詢更改爲

$stmt = $pdo->prepare("SELECT * FROM $table WHERE urlid = :used"); 

，並確保您的變量$表的定義正確