PDO::__construct – Creating a PDO Instance for Database Connections
The PDO::__construct method creates a PDO object that represents a connection to a database, detailing its parameters—DSN, username, password, and driver options—return value, and providing a complete PHP example of establishing and handling a MySQL connection.
PDO::__construct creates a PDO instance that represents a connection to a database.
Parameters
dsn – Data Source Name containing the information required to connect to the database. It typically consists of the driver name, a colon, and driver‑specific connection syntax.
username – The username for the DSN string; optional for some drivers.
password – The password for the DSN string; optional for some drivers.
driver_options – An associative array of driver‑specific options.
Return value
On success, returns a PDO object.
Example
<?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();
}
?>Signed-in readers can open the original source through BestHub's protected redirect.
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