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flatpress/fp-includes/smarty-4.4.1/docs/programmers/api-variables/variable-caching.md
Fraenkiman e544ed6d9a Smatry Release 4.4.1 on Feb-2024 
Comparing changes: https://github.com/smarty-php/smarty/compare/v4.3.1...v4.4.1

It is noticeable that Smarty 4.3.1 does not officially support PHP 8.3. Is only supported with 4.4.0.

Remark:

During tests with Smarty 4.5.1, it was noticed that the following warning occurs:
Deprecated: Using the unregistered function "function_exists" in a template is deprecated and will be removed in a future version. Use Smarty::registerPlugin to explicitly register a custom modifier.

As of Smarty 5.X.X, templates must be revised again.
The Smarty release 5.0.2 is already officially available. However, integration into FlatPress is not entirely trivial.
2024-04-14 18:37:39 +02:00

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$caching

This tells Smarty whether or not to cache the output of the templates to the $cache_dir. By default this is set to the constant Smarty::CACHING_OFF. If your templates consistently generate the same content, it is advisable to turn on $caching, as this may result in significant performance gains.

You can also have multiple caches for the same template.

  • A constant value of Smarty::CACHING_LIFETIME_CURRENT or Smarty::CACHING_LIFETIME_SAVED enables caching.

  • A value of Smarty::CACHING_LIFETIME_CURRENT tells Smarty to use the current $cache_lifetime variable to determine if the cache has expired.

  • A value of Smarty::CACHING_LIFETIME_SAVED tells Smarty to use the $cache_lifetime value at the time the cache was generated. This way you can set the $cache_lifetime just before fetching the template to have granular control over when that particular cache expires. See also isCached().

  • If $compile_check is enabled, the cached content will be regenerated if any of the templates or config files that are part of this cache are changed.

  • If $force_compile is enabled, the cached content will always be regenerated.

See also $cache_dir, $cache_lifetime, $cache_modified_check, is_cached() and the caching section.