如果我连接 MySql，它会随机工作与否连接超时

如何解决如果我连接 MySql，它会随机工作与否连接超时

我最近做了一个动态链接，并从数据库中检索了相应的行。有一天它运行得很好，其他时候却没有？我该如何解决？也提前感谢您的帮助！

    <?PHP
include 'navbar.html';
$userID = $_GET['id'];

set_time_limit(0);   
ini_set('MysqL.connect_timeout','0');   
ini_set('max_execution_time','0'); 

$servername = "hostname";
$username = "user";
$password = "pw";
$dbname = "name_of_db";

// Create connection
$conn = MysqLi_connect($servername,$username,$password,$dbname);
// Check connection
if (!$conn) {
  die("Connection Failed: " . MysqLi_connect_error());
}

$sql = "SELECT id,username,bio FROM accounts WHERE id=$userID";
$result = MysqLi_query($conn,$sql);

if (MysqLi_num_rows($result) > 0) {
  // output data of each row
  while($row = MysqLi_fetch_assoc($result)) {
    echo "id: " . $row["id"]. " - Name: " . $row["username"]. " Bio: " . $row["bio"]. "<br>";
  }
} else {
  echo "0 results";
}

MysqLi_close($conn);
?>

解决方法

你错过了一些引号

$sql = "SELECT id,username,bio FROM accounts WHERE id='$userID'";

,

它仍然不起作用：/我试图引用，但没有