Preferred way of cacheing a value in php

1. How do I cache a variable in PHP?
2. How do I cache a query in PHP?
3. Where is PHP cache stored?
4. What are the components of cache?
5. Do PHP files get cached?
6. How does PHP Cache work?
7. What is MySQL query cache?
8. How do I flush PHP Cache?
9. What are PHP namespaces?
10. Whats is cache memory?

How do I cache a variable in PHP?

You can dump any variable (including an array) using serialize, and the inverse is unserialize. Dumping to a file would be quite a useless cache solution, you can consider using memcache which can store any variable in memory, but requires some work on server side.

How do I cache a query in PHP?

We can use the file_put_contents() function to take the results of our database query (stored in the $rows variable) and save it to the cache. txt file. The file_put_contents() PHP function is identical to calling fopen() , fwrite() and fclose() successively to write data to a file.

Where is PHP cache stored?

Your application's cache configuration file is located at config/cache. php . In this file, you may specify which cache driver you would like to be used by default throughout your application.

What are the components of cache?

The Cache component provides features covering simple to advanced caching needs.
...
The following cache adapters are available:

• APCu Cache Adapter.
• Array Cache Adapter.
• Chain Cache Adapter.
• Couchbase Cache Adapter.
• Doctrine Cache Adapter.
• Filesystem Cache Adapter.
• Memcached Cache Adapter.
• PDO & Doctrine DBAL Cache Adapter.

Do PHP files get cached?

I came to the conclusion that, by default, php files are never EVER pulled from cache, even in mobile browsers, even if in the response there is no Cache-Control nor Expires parameter, even if i don't send POST requests and i just follow a link to the page. ... By contrast, css/js/image files are fetched from cache.

How does PHP Cache work?

A cache is a collection of duplicate data, where the original data is expensive to fetch or compute (usually in terms of access time) relative to the cache. ... PHP 'output caching' saves a chunk of data somewhere that can later be read by another script faster than it can generate it. 'Parser caching' is specific feature.

What is MySQL query cache?

The MySQL query cache is a global one shared among the sessions. It caches the select query along with the result set, which enables the identical selects to execute faster as the data fetches from the in memory.

How do I flush PHP Cache?

As a PHP developer

You can call the apc_clear_cache() function to clear the cache. To clear the user cache (key/value), you can use apc_cache_clear('user') . To clear the system cache, the one that holds the byte-code of the PHP files (the so called “opcode” cache), just call apc_cache_clear() without options.

What are PHP namespaces?

A namespace is a hierarchically labeled code block holding a regular PHP code. A namespace can contain valid PHP code. Namespace affects following types of code: classes (including abstracts and traits), interfaces, functions, and constants. Namespaces are declared using the namespace keyword.

Whats is cache memory?

Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately available to the CPU when needed. Cache memory is used to reduce the average time to access data from the Main memory.