mysql - How to close database connection in php while database file is included? -

i have page pae1.php has code like

include_once('db.php');

in db.php connection established

$con= mysql_connect("localhost", "username", "password") or die(mysql_error());  mysql_select_db("dbname") or die(mysql_error());

i run query on page1.php as

$delete_s1ql="delete tbl_info id='$id' "; $res_del=mysql_query($delete_s1ql) or die(mysql_error());

now want close database connection on page1.php.

how can this?

change db.php (to make sure selected database bound resource):

$con= mysql_connect("localhost", "username", "password") or die(mysql_error());  mysql_select_db("dbname", $con) or die(mysql_error());

in page1.php add end (use global resource-variable close correct connection):

mysql_close($con);

ps: take @ pdo better way connect , talk database.

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