An Example Cache Refresh Function

gistfile1.aw

<?php
function ohsc_get_ratings( $prime_cache = false ) {
	$movies = array(
		'The Usual Suspects',
		'Braveheart',
		'The King\s Speech'
	);
	
	$cache_key = 'ohsc-' . serialize( $movies );
	
	// Check the cache for the movies
	$ratings = get_transient( $cache_key );
	
	if ( false === $ratings || $prime_cache ) {
		// This function queries the API and gets the 3 movie's data
		$imdb_movies = ohsc_get_movies( $movies );
		
		$ratings = array();
		
		foreach ( $imdb_movies as $movie )
			$ratings[$movie->Title] = $movie->Rating;
		
		// Add the ratings to the cache	
		if ( ! empty( $ratings ) )
			set_transient( $cache_key, $ratings );
		else
			set_transient( $cache_key, 'no-data' );
	}
	
	return $ratings;	
}