Question

i have a few question on php db connection and hoping someone can answer them all, when i create a db connection using pdo, like below

<?php
/* Connect to an ODBC database using driver invocation */
$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';

try {
    $dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
}

?>

1. is this connection always created when someone refreshes the php page?
2. or does it check if that connection is already open and then use that connection instead?
3. how would i be able to close that connection when i am done with it?

Answer 1

1. yes
2. nope. It tries to utilize previously established connections only if you have set up permanent connections
3. generally you don’t need to do anything special. php does that as long as your script ends