How to connect the php with mysql

Question

I wrote a program on sublime text and i wanna run it on wampserver. For that how can connect with its database.
I wrote a program on register login form

Answer 1

MySQL is deprecated in PHP5 and removed from PHP7. Please use mysqli

Answer 2

<?php
$con=mysql_connect("localhost","user_name","password") or die("Could not connect "+mysql_error());
$d=mydql_select_db("database_name",$con);
mysql_query("query...");

?>

Answer 3

try this one
<?php
$connection = mysqli_connect('localhost', 'username', 'password', 'database');
mysqli_query($connection, 'CREATE TEMPORARY TABLE `table`');
?>