How to insert the Values From Frontend to Backend in PHP

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Create connection file ... conn.php

<?php

define('DB_NAME', 'gk');
define('DB_USER', 'gk');
define('DB_PASSWORD', 'gk123');
define('DB_HOST', 'localhost');

$link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
if(!$link) {
die('Failed to connect to server: ' . mysql_error());
}

//Select database
$db = mysql_select_db(DB_NAME);
if(!$db) {
die("Unable to select database");
}

?>

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