I need custom php file and upload to magento

example myconnect.php

<?php
$servername = "localhost";
$username = "";
$password = "";
try {
    $conn = new PDO("mysql:host=$servername;dbname=meigee", $username, $password);
    //set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully";
} catch(PDOException $e) {
    echo "Connection failed: " . $e->getMessage();
}
echo "<br>";
echo "PHP on Magento";
?>

how to upload file mycon.php? Magento1.9.4.3