PHP得到以下错误：“致命错误：未捕获的异常‘PDOException’”

Question

我试图检索单行以下功能：

function get_registrar($key){ 
    global $db; 

    $query = 'SELECT * FROM registration WHERE key = :key'; 
    $statement = $db->prepare($query); 
    $statement->bindValue(':key', $key); 
    $statement->execute(); 
    $result = $statement->fetch(); 
    $statement->closeCursor(); 
    return $result; 
} 

而且我不断收到“致命错误：未捕获的异常'PDOException'消息'SQLSTATE [42000]：“错误消息。任何想法，为什么这可能是？由于

Answer 1

关键是一个保留关键字

所以BACKTICK它作为

`key` 

$query = 'SELECT * FROM registration WHERE `key` = :keyval'; 

下面是保留关键字

https://dev.mysql.com/doc/refman/5.5/en/reserved-words.html