Answers for "pdo connection to the database using functions"

php pdo connection

$host     = "localhost";//Ip of database, in this case my host machine    
$user     = "root";	//Username to use
$pass     = "qwerty";//Password for that user
$dbname   = "DB";//Name of the database

try {
    $connection = new PDO("mysql:host=$host;dbname=$dbname", $user, $pass);
    $connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

}catch(PDOException $e)
{
  echo $e->getMessage();                         
}

php PDO database connection

$hostName = "localhost";
$dbName = "test";
$userName = "test";
$password = "test1";
try {
    $pdo = new PDO("mysql:host=$hostName;dbname=$dbName",$userName,$password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully"; 
    }
    catch(PDOException $e)
    {
     echo "Connection failed: " . $e->getMessage();
    }