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Basic File Cache Tutorial - PHP
This document provides an overview of basic file caching in ProdigyView to improve server performance. It demonstrates how to write, read, check expiration, and delete cache files. Key aspects include initializing the cache object, setting cache options like expiration time and name, and storing different data types like objects and arrays. The document recommends checking if cache has expired before reading or writing, and only updating the cache content after expiration. It links to an API reference and more tutorials for additional information.
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Basic File Cache Tutorial - PHP
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- 2. Overview Objective Learn the basicsof caching data in ProdigyView to help speed up your server’s performance. Requirements Basic Understanding of Cache Estimated Time 12 Minutes
- 3. Follow Along WithCode Example 1. 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
- 4. 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 object 2. Set the key/name 3. Write content to cache
- 5. Adding Options Cache usesthe default values that can be set in PVCache::init(). To override those default values, we can pass in our own options. Set the expiration time in seconds Modify Cache Expiration and the name of the cache
- 6. Reading The Cache Withcache that is stored, we need a way of reading it. They key/name used to save the cache will also be used for reading it.
- 7. The Cache Tag Bydefault, the tag used to identify the cache is removed, If you want to read the cache tag, pass the options in not to remove the tag. Set the option keeping the cache tag Remember to set the cache name if not using the default
- 8. Cache Tag Results Cache Tag Cache Tag With Explicitly Set Name
- 9. Checking Expiration Oh, sothat is the tag used for setting the expiration. Wait, how do you check the expiration? Simply pass the key/name of the file to check. Check if the cache has expired by the key Check name and key
- 10. Expiration Date If youneed to pull the expiration date from the file, PVCache::getExpiration() method will pull the date for you in a string format. Get the expiration in a date format Add the option to use a name for the cache
- 11. Expiration Date Result Expiration date/time format
- 12. Delete Cache The finalstep to manipulating the cache is to delete the cache. After it is deleted, accessing cache through that key will return a null.
- 13. Objects And Array Oneof the coolest features about the cache in ProdigyView is the ability to store objects and arrays into cache. These data structures will be serialized on entry and unserialized on retrieval. Set the cache key/name Pass array into cache Read the cache as normal and print out key
- 14. How to usecache 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
- 15. Challenge! This is anoptional challenge to improve you understanding 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.
- 16. API Reference For abetter understanding of cache in ProdigyView, visit the api by clicking on the link below. PVCache More Tutorials For more tutorials, please visit: http://www.prodigyview.com/tutorials www.prodigyview.com