如何使用php（託管在dotCloud上）連接到遠程mysql數據庫

Question

我無法連接到我的數據庫駐留在dotCloud。我想：

$mysqli = new mysqli($db_host, $db_user, $db_password, $db_name); 

和

$mysqli = mysqli_connect($db_host, $db_user, $db_password, $db_name); 

和

$mysqli = new mysqli($remote_server, $db_user, $db_password, $db_name); 

和

$mysqli = mysqli_connect($remote_server, $db_user, $db_password, $db_name); 

，但連接失敗，我也得到「錯誤324（淨值:: ERR_EMPTY_RESPONSE）：服務器關閉沒有sendin的連接g任何數據。「

我找回動態上面下面的mysqli的腳本變量：

$env = json_decode(file_get_contents("/home/dotcloud/environment.json")); 
$db_user = $env->DOTCLOUD_DB_MYSQL_LOGIN; 
$db_password = $env->DOTCLOUD_DB_MYSQL_PASSWORD; 
$db_host = $env->DOTCLOUD_DB_MYSQL_HOST; 
$db_port = $env->DOTCLOUD_DB_MYSQL_PORT; 
$remote_server = '$db_host:$db_port'; 
//I also define $db_name here 
$db_name = 'mydbname'; 

我也有mysqli的腳本下面的下面的代碼：

if (mysqli_connect_error()) { 
    die('Connect Error (' . mysqli_connect_errno() . ') '. mysqli_connect_error()); 
    $result["status"] = "failed"; 
    $result["message"] = "Failed to connect to database."; 
    echo json_encode($result); 
    exit; 
} else { 
    // Successfully connected! 
    $stmt = $mysqli->stmt_init(); 
    echo "<p>Successfully connected!!</p>"; 
} 

我在做什麼錯？

Answer 1

您的代碼中有幾個錯誤。

1.您$ remote_server的變量是使用單引號

$remote_server = '$db_host:$db_port'; 

這意味着$ remote_server的不會擴大$ DB_HOST和$ DB_PORT變量。你應該使用雙引號。如果你使用了這個變量，它就不適合你。

$remote_server = "$db_host:$db_port"; 

更多信息，請參見本頁面： http://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.single

2.您不使用連接時，MySQL的端口，這是需要在dotCloud因爲它不標準端口上運行mysql 3306

您的代碼：

$mysqli = new mysqli($db_host, $db_user, $db_password, $db_name); 

正確的代碼，使用變量，你上面已經宣佈：

$mysqli = new mysqli($db_host, $db_user, $db_password, $db_name, $db_port); 

更多信息可以在這裏找到：http://www.php.net/manual/en/mysqli.quickstart.connections.php

對於一個完整的例子，它看起來像這樣。

$env = json_decode(file_get_contents("/home/dotcloud/environment.json")); 
$db_user = $env->DOTCLOUD_DB_MYSQL_LOGIN; 
$db_password = $env->DOTCLOUD_DB_MYSQL_PASSWORD; 
$db_host = $env->DOTCLOUD_DB_MYSQL_HOST; 
$db_port = $env->DOTCLOUD_DB_MYSQL_PORT; 
//I also define $db_name here 
$db_name = 'mydbname'; 

$mysqli = new mysqli($db_host, $db_user, $db_password, $db_name, $db_port); 
if ($mysqli->connect_errno) { 
    echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error; 
} 

echo $mysqli->host_info . "\n"; 

Answer 2

try like this: I think it will help you. 

$connect = mysql_connect($mysql_host, $mysql_user, $mysql_password); 
if (!$connect) { 
    die('Could not connect: ' . mysql_error()); 
} 
//echo 'Connected successfully'; 

$db = mysql_select_db($mysql_database,$connect); 

if (!$db) echo"'Could not select database";