The function "getInstance()" is a method used to create a single instance of a class in PHP. It is commonly used in database connections to ensure that only one connection is made to the database at a time.
In this example, we are using the "getInstance()" method to create a singleton instance of a database connection class named "DB". We then use the connection to prepare and execute a SQL statement to fetch all the users from a table.
Example 2:
class Config { private $settings = array(); private static $_instance;
public static function getInstance() { if(!self::$_instance) { self::$_instance = new self(); } return self::$_instance; }
public function get($key) { return $this->settings[$key]; } }
In this example, we are creating a singleton instance of a configuration class named "Config". We use the "getInstance()" method to create a single instance of the class and then use the class to retrieve settings using the "get()" method.
The package library for these examples is unknown, as "getInstance()" is a commonly used method across various PHP frameworks and libraries.
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