我有一个简单的“即将推出”页面,我在其中订阅了我打算插入到mysql数据库中的订阅电子邮件。获取'Class PDO not found'错误
我以前运行过代码,但现在在1-2周后回来,似乎有一些问题。
基本上只涉及2个文件:index.html
和subscribe.php
。 index.html
是实际“预购页面,并呼吁subscribe.php
实际插入电子邮件进入数据库,提供了一个有效的电子邮件,是不是重复,等等。
为subscribe.php
的代码如下所示。它是一个非常简单的代码。
难道这不是以前的工作!但是现在,似乎是一个“类PDO没有发现......”在这里被使用PDO行未来的错误:
<?php
function isValidEmail($email = null)
{
return preg_match("/^
[\d\w\/+!=#|$?%{^&}*`'~-]
[\d\w\/\.+!=#|$?%{^&}*`'~-]*@
[A-Z0-9]
[A-Z0-9.-]{0,61}
[A-Z0-9]\.
[A-Z]{2,6}$/ix", $email);
}
try {
// Connect to the SQLite Database.
$db = new PDO('mysql:host=hostnamehere;dbname=dbnamehere', 'usernamehere', 'passwordhere');
} catch(Exception $e) {
die('connection_unsuccessful');
}
/* Check if table exists */
$db->exec('CREATE TABLE IF NOT EXISTS subscribers (email VARCHAR(255), time VARCHAR(255))');
/* Check if email has been posted */
if (isset($_POST['email'])) {
/* Validate email */
if (isValidEmail($_POST['email'])) {
/* Check for duplication */
$query = $db->prepare('SELECT COUNT(*) AS count FROM subscribers WHERE email = :email');
$query->execute(array(':email' => $_POST['email']));
$result = $query->fetch();
if ($result['count'] == 0) { // E-mail is unique.
$query = $db->prepare('INSERT INTO subscribers (email, time) VALUES (:email, :time)');
$query->execute(array('email' => $_POST['email'], 'time' => date('Y-m-d H:i:s')));
/* Send mail notification */
$to = '[email protected]'; // Email notified of the new subscription
$subject = 'New subscriber';
$message = 'Hi, you have one new subscriber. This is his/her e-mail address: ' . $_POST['email'] . '.';
$headers = "From:" . $_POST['email'];
mail($to,$subject,$message,$headers);
echo 'successful';
} else { // E-mail is already being used.
echo 'already_subscribed';
}
} else {
echo 'invalid_email';
}
}
1.什么版本的PHP? 2.有没有名称空间? '\ PDO'会发生什么? –