isCached()

returns true if there is a valid cache for this template

Description

bool

isCached

string

template

string

cache\_id

string

compile\_id

• This only works if $caching is set to one of `Smarty::CACHING_LIFETIME_CURRENT` or `Smarty::CACHING_LIFETIME_SAVED` to enable caching. See the caching section for more info.
• You can also pass a `$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`.

> Note > > If isCached() 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 isCached() and to > display() in the example above. This also means > calls to clearCache() and other changes of the > cache-settings may have no effect after isCached() returned TRUE.

<?php
$smarty->setCaching(Smarty::CACHING_LIFETIME_CURRENT);

if(!$smarty->isCached('index.tpl')) {
// do database calls, assign vars here
}

$smarty->display('index.tpl');
?>

<?php
$smarty->setCaching(Smarty::CACHING_LIFETIME_CURRENT);

if(!$smarty->isCached('index.tpl', 'FrontPage')) {
  // do database calls, assign vars here
}

$smarty->display('index.tpl', 'FrontPage');
?>

See also clearCache(), clearAllCache(), and caching section.