How can one properly use mysql_select_db() function in PHP to select a database?

When using the mysql_select_db() function in PHP to select a database, you need to establish a connection to the MySQL server using mysql_connect() before calling mysql_select_db(). Make sure to pass the database name as a parameter to mysql_select_db() to switch to the desired database. 

// Establish a connection to the MySQL server
$connection = mysql_connect('localhost', 'username', 'password');

// Check if the connection was successful
if (!$connection) {
    die('Could not connect: ' . mysql_error());
}

// Select the database
$database = 'database_name';
mysql_select_db($database, $connection);

Keywords

mysql_select_db PHP database function select

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