我该如何检查多个因素的组合,而不是逐个检查?基本上,我正在使用PDO,并且必须确保用户名和电子邮件地址是唯一的。那我该怎么做呢?我看过了...
if ( $sthandler->rowCount() > 0 ) {
// do something here
}
但是有没有更好的方法来完成它呢?如果没有,可以有人解释一下我如何使用它吗?
编辑 以下是我的查询代码,将其输入到数据库中
<?php
try {
$handler = new PDO('mysql:host=localhost;dbname=s','root', '*');
$handler->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e){
exit($e->getMessage());
}
$name = $_POST['name'];
$username = $_POST['username'];
$email = $_POST['email'];
$password = $_POST['password'];
$password1 = $_POST['passwordconf'];
$ip = $_SERVER['REMOTE_ADDR'];
//Verifcation
if (empty($name) || empty($username) || empty($email) || empty($password) || empty($password1))
{
echo "Complete all fields";
}
// Password match
if ($password != $password1)
{
echo $passmatch = "Passwords don't match";
}
// Email validation
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
{
echo $emailvalid = "Enter a valid email";
}
// Password length
if (strlen($password) <= 6){
echo $passlength = "Choose a password longer then 6 character";
}
function userExists($db, $user)
{
$userQuery = "SELECT * FROM userinfo u WHERE u.user=:user;";
$stmt = $db->prepare($userQuery);
$stmt->execute(array(':user' => $user));
return !!$stmt->fetch(PDO::FETCH_ASSOC);
}
$user = 'userName';
$exists = userExists($db, $user);
if(exists)
{
// user exists already.
}
else
{
// user doesn't exist already, you can savely insert him.
}
if(empty($passmatch) && empty($emailvalid) && empty($passlength)) {
//Securly insert into database
$sql = 'INSERT INTO userinfo (name ,username, email, password, ip) VALUES (:name,:username,:email,:password,:ip)';
$query = $handler->prepare($sql);
$query->execute(array(
':name' => $name,
':username' => $username,
':email' => $email,
':password' => $password,
':ip' => $ip
));
}
?>