Question

似乎是什么问题，因为我的凭据是正确的，当我使用mysqli oop时它确实连接但在我使用pdo时失败了。我使用000webhost作为我的自学ftp网站。我一直在寻找答案，但似乎无法自己解决。

pdo中的

错误：

连接错误：SQLSTATE [28000] [1045]拒绝用户访问＆＃39; a1882281_user＆＃39; @＆＃39;本地主机＆＃39; （使用密码：是）

当我的主机是mysql9.000webhost.com时，为什么localhost在那里？

它不应该显示＆＃39; a1882281_user＆＃39; mysql9.000webhost.com＆＃39;？

// mysqli oop, working
<?php

$host = "mysql9.000webhost.com";
$username = "a1882281_user";
$password = "********"; //my password is all numbers
$db = "a1882281_db";

$conn = new mysqli($host, $username, $password, $db);

if(!$conn){
echo "error connecting: " . $conn->error;
}

$sql = "SELECT firstname FROM Friends";
$result = $conn->query($sql);

while($row = $result->fetch_assoc()){
echo $row['firstname'];
}

$result->free();
$conn->close();

?>



// pdo, cannot connect :(
<?php

$host = "mysql9.000webhost.com";
$username = "a1882281_user";
$password = "********"; //my password is all numbers
$db = "a1882281_db";

try{
$conn = new pdo("mysql:host = $host; dbname = $db", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

}catch(PDOException $ex){
echo "connect error: " . $ex->getMessage();
}

?>

Answer 1

您的错误与内部字符串中存在的空格有关：

$conn = new PDO("/*...string inside here...*/", $username, $password);

以下完整代码应该可以正常工作：

<?php
$host = "mysql9.000webhost.com";
$username = "a1882281_user";
$password = "********"; //my password is all numbers
$db = "a1882281_db";

try {
    $conn = new PDO("mysql:host=$host;dbname=$db", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully"; 
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage();
    }
?>

麻烦连接到PDO但mysqli工作得很好

1 个答案: