is_cached()returns true if there is a valid cache for this templateDescriptionboolis_cachedstringtemplatestringcache_idstringcompile_id
This only works if
$caching is set to &true;, see the
caching section for more info.
You can also pass a $cache_id as an optional second
parameter in case you want
multiple caches
for the given template.
You can supply a
$compile id
as an optional third parameter. If you omit that parameter the persistent
$compile_id is used if its set.
If you do not want to pass a $cache_id but want to
pass a
$compile_id you have to pass
&null; as a $cache_id.
Technical Note
If is_cached() returns &true; it actually loads the
cached output and stores it internally. Any subsequent call to
display() or
fetch()
will return this internally stored output and does not try to reload
the cache file. This prevents a race condition that may occur when a
second process clears the cache between the calls to
is_cached() and to
display()
in the example above. This also means calls to
clear_cache()
and other changes of the cache-settings may have no effect after
is_cached() returned &true;.
is_cached()
caching = true;
if(!$smarty->is_cached('index.tpl')) {
// do database calls, assign vars here
}
$smarty->display('index.tpl');
?>
]]>
is_cached() with multiple-cache template
caching = true;
if(!$smarty->is_cached('index.tpl', 'FrontPage')) {
// do database calls, assign vars here
}
$smarty->display('index.tpl', 'FrontPage');
?>
]]>
See also
clear_cache(),
clear_all_cache(),
and
caching section.