$.ajax({
        type: "GET",
        url: "connect/database.php",
        dataType: "json",
        success: function(response){
        alert(response);
      }
   });

<?php


$servername = "localhost";
$username = "the_username";
$password = "the_password";
$dbname = "the_db";

// create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
   die("Connection failed: " . $conn->connect_error);
}

$array_result = array();

$sql = mysqli_query("select * from table where user = 'bobo'");
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        $array_result[] = $row;
    }
} else {
    echo "0 results";
}

$conn->close();

print json_encode($array_result)

?>