I can access clearDB database well by using Mysql Workbench.
But when I query database by using php on Heroku, it always fail.
This is my code:
$url=parse_url(getenv("CLEARDB_DATABASE_URL"));
$dbhost = $url["host"];
$dbuser = $url["user"];
$dbpass = $url["pass"];
$dbname = substr($url["path"],1);
mysqli_connect($dbhost, $dbuser, $dbpass);
mysqli_select_db($dbname);
$sql = "SELECT * FROM `user_info` WHERE `user_account`='".$user_account."'";
$result = mysqli_query($sql) or die('MySQL query error');
user_account is a table in the database, $user_account is a input variable from client user
help me thanks