10個のmysqlデータベースに接続し、すべてのデータから実行する

Question

10個の同じmysqlデータベースを接続して、それらをすべて一直線に印刷しようとします。

これがどのように機能するかの例を私に与えることができる人がいますか？

$servername = "localhost"; 
$username1 = "***"; 
$password = "***"; 

$v1 = "wp282"; 
$v2 = "wp111"; 
$v3 = "wp72"; 
$v4 = "wp193"; 
$v5 = "wp555"; 
$v6 = "wp366"; 
$v7 = "wp74"; 
$v8 = "wp721"; 
$v9 = "wp924"; 
$v10 = "wp253"; 

$conn = mysqli_connect($servername, $username1, $password, $v1 "v2,v3,v4,v5,v6,v7,v8,v9,v10"); 
$query100 = mysqli_query($conn, "SELECT * FROM `wpd2_posts` where post_status='wc-processing' or post_status='wc-completed' or post_status='wc-failed' order by post_date DESC LIMIT $sidenr2,50") or die(mysqli_error($conn)); 

while($row = mysqli_fetch_array($query100))   
{ 
    echo $row['ID']; 
} 

Answer 1

これは奇妙な要求だと思われますが、もちろん実行できます。

$servername = "localhost"; 
$username1 = "***"; 
$password = "***"; 

$databases = array("wp282","wp111","wp72","wp193","wp555", 
        "wp366","wp74","wp721","wp924","wp253"); 

foreach ($databases as $database) { 
    $con = new mysqli($servername, $username1, $password, $database); 

    $result = $con->query($con, "SELECT * 
            FROM `wpd2_posts` 
            where post_status='wc-processing' 
            or post_status='wc-completed' 
            or post_status='wc-failed' 
            order by post_date DESC 
            LIMIT $sidenr2,50") 
        or die($con->error); 

    while($row = $result->fetch_assoc()) { 
     echo $row['ID'] . ' '; 
    } 
    $con->close(); 
} 

私は$sidenr2が、これはあなたが10個の同一のデータベースを持つべきではないです動作するはずですどのような方法