User::identify()

gistfile1.php

	/**
	 * Check for the existence of a cookie, and return a user object of the user, if successful
	 * @return User user object, or false if no valid cookie exists
	 */
	public static function identify()
	{
		$out = false;
		// Let plugins set the user
		if ( $out = Plugins::filter('user_identify', $out) ) {
			self::$identity = $out;
		}
		// If we have a user_id for this user in their session, use it to get the user object
		if ( isset( $_SESSION['user_id'] ) ) {
			if ( $user = self::get_by_id( intval( $_SESSION['user_id'] ) ) ) {
				// Cache the user in the static variable
				self::$identity = $user;
				$out = $user;
			}
		}
		// Is the logged-in user cached?
		if ( $out instanceof User ) {
			// is this user acting as another user?
			if ( isset( $_SESSION['sudo'] ) ) {
				// if so, let's return that user data instead
				$out = self::get_by_id( intval( $_SESSION['sudo'] ) );
			}
		}
		else {
			$out = self::anonymous();
		}
		return $out;
	}