Cannot connect to MySQLi in PHP? [duplicate]

Answer 1

//just fill your own settings...

$server = "localhost"; 
$user   = "root"; 
$password = "*****"; 
$database = "uyelik";
$db= mysqli_connect($server ,$user, $password);
if(!$db) { echo 'Mysqli conn. error: ' . mysqli_connect_errno(); exit;}
mysqli_select_db($db,$database);
$query = mysqli_query($db,"SELECT * FROM lists") or die (mysql_error());

Answer 2

<?php   
$servername = "localhost";  //replace your servername
$username = "root";   //replace your username
$password = "";        //replace your password
$dbname = "test";    //replace your database name

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
//Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
    echo ' not connected';
}
else
    echo 'connected';
?>

execute this and tell me the output.

Answer 3

$sql = "SELECT * FROM users";
$result = mysqli_query($conn,$sql);

while($row = mysqli_fetch_array($result))
{
   echo "id: " . $row["id"];
}

Try this instead of your code.

Answer 4

For successful SELECT, SHOW, DESCRIBE or EXPLAIN queries mysqli::query (or mysqli_query()) will return a mysqli_result object (see this article mysqli.query). So in your case you can't just echo this, you can see rows data like this:

$mysqli = new mysqli("104.236.***.57", "Josh", "********", "******");

if ($mysqli->connect_errno) {
    printf("Connect failed: %s\n", $mysqli->connect_error);
    exit();
}

/* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */
if ($result = $mysqli->query("SELECT * FROM users", MYSQLI_USE_RESULT)) {
    /* prints number of result rows */
    printf("Select returned %d rows.\n", $result->num_rows);
    /* Cycle through results */
    echo "Table data:\n";
    while ($row = $result->fetch_object()){
        var_dump($row);
    }
    /* free result set */
    $result->close();
}

/* close connection */
$mysqli->close();

Also, check your database server (104.236.***.57) made available for remote access. Check with your hosting company if you can access the database server from outside.

Answer 5

Can you please check whether Mysql is running or not. It usually happens when your droplet runs out of memory. In that case you can add a swap file to your droplet.