OverviewObjectiveLearn the basics of caching data in ProdigyView to helpspeed up your server’s performance.Requirements Basic Understanding of CacheEstimated Time12 Minutes
Follow Along With Code Example1. Download a copy of the example code at www.prodigyview.com/source.2. Install the system in an environment you feel comfortable testing in.3. Proceed to examples/system/Cache.php
Create Cache Writing a file to cache is relatively simple. All you need is a key/name and content to put in the cache. 1. Initialize the cache object2. Set the key/name 3. Write content to cache
Adding OptionsCache uses the default values that can be set inPVCache::init(). To override those default values, we canpass in our own options. Set the expiration time in seconds Modify Cache Expiration and the name of the cache
Reading The CacheWith cache that is stored, we need a way of reading it.They key/name used to save the cache will also be usedfor reading it.
The Cache TagBy default, the tag used to identify the cache isremoved, If you want to read the cache tag, pass theoptions in not to remove the tag. Set the option keeping the cache tag Remember to set the cache name if not using the default
Cache Tag Results Cache TagCache Tag With Explicitly Set Name
Checking ExpirationOh, so that is the tag used for setting the expiration.Wait, how do you check the expiration? Simply pass thekey/name of the file to check. Check if the cache has expired by the key Check name and key
Expiration DateIf you need to pull the expiration date from thefile, PVCache::getExpiration() method will pull the datefor you in a string format. Get the expiration in a date format Add the option to use a name for the cache
Expiration Date Result Expiration date/time format
Delete CacheThe final step to manipulating the cache is to delete thecache. After it is deleted, accessing cache through thatkey will return a null.
Objects And ArrayOne of the coolest features about the cache inProdigyView is the ability to store objects and arrays intocache. These data structures will be serialized on entryand unserialized on retrieval.Set the cache key/name Pass array into cache Read the cache as normal and print out key
How to use cache We know how to read, write, check and delete cache, but we actually use it? Simple, check then read or write.1. Check if the cache has expired first 2. If is not expired, return the cache 3. If it has expired, query that database to find your content. 4. Write the content to cache and return it
Challenge!This is an optional challenge to improve youunderstanding of cache.1. Create a page with header , body and footer content in a string.2. Write the header content to cache and set to expire in 3 minutes.3. Write the body content to cache and set to expire in 5 minutes.4. Write the footer content to cache and set to expire in 7 minutes.5. Add new content to each section of the page only after the content has expired.
API ReferenceFor a better understanding of cache in ProdigyView, visitthe api by clicking on the link below.PVCache More TutorialsFor more tutorials, please visit:http://www.prodigyview.com/tutorials www.prodigyview.com