Smarty

[datamile]

Might be a bug or misuse of a feature.

Ok I've got caching on for all pages , and pages have sub-templates , and insert templates with their own cache.

A page has its self , a primary block from which its gets title etc , and several secondary blocks. Primary and secondary can swap around depending on the page.

If a block is first cached as a secondary block, then is needed as a primary block , and the primary page is not cached, then I need to reload the primary to get the data to transfer to the primary page.

So I used the full logic

before generating the primary page and primary block

if !is_cache(primary_page) and is_cache(primary_block)
clear_cache(primary_block)
end

then primary block code says
if !is_cache(primary_block)
get_data etc
end
fetch_template.

The problem is that the first is_cache(primary_block) calls _read_cache_file which puts the template in static var content_cache. After this, deleting the cache file has no effect , as the second is_cache just looks at content_cache and believes the template loaded.

[messju]

it's a feature. if is_cached() returns true, it saves the cached page as a static variable (as you noticed). this avoids a race-condition that may occur between calling is_cached() and calling display() (believing your page is cached).