{insert}
{insert} tags work much like {include} tags,
except that {insert} tags are NOT cached when you have
template caching enabled. They
will be executed on every invocation of the template.
Let's say you have a template with a banner slot at the top of
the page. The banner can contain any mixture of HTML, images,
flash, etc. so we can't just use a static link here, and we
don't want this contents cached with the page. In comes the
{insert} tag: the template knows #banner_location_id# and
#site_id# values (gathered from a
config file), and needs to
call a function to get the banner contents.
Example 7-14. function {insert} {* example of fetching a banner *}
{insert name="getBanner" lid=#banner_location_id# sid=#site_id#} |
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In this example, we are using the name "getBanner" and passing the
parameters #banner_location_id# and #site_id#. Smarty will look
for a function named insert_getBanner() in your PHP application, passing
the values of #banner_location_id# and #site_id# as the first argument
in an associative array. All {insert} function names in
your application must be prepended with "insert_" to remedy possible
function name-space conflicts. Your insert_getBanner() function should
do something with the passed values and return the results. These results
are then displayed in the template in place of the {insert} tag.
In this example, Smarty would call this function:
insert_getBanner(array("lid" => "12345","sid" => "67890"));
and display the returned results in place of the {insert} tag.
If you supply the "assign" attribute, the output of the {insert} tag
will be assigned to this template variable instead of being output
to the template. NOTE: assigning the output to a template variable
isn't too useful with
caching enabled.
If you supply the "script" attribute, this php script will be
included (only once) before the {insert} function is executed. This
is the case where the insert function may not exist yet, and a php
script must be included first to make it work. The path can be
either absolute, or relative to
$trusted_dir. When security is enabled, the script
must reside in $trusted_dir.
The Smarty object is passed as the second argument. This way you
can reference and modify information in the Smarty object from
within the {insert} function.
Technical Note:
It is possible to have portions of the template not
cached. If you have caching
turned on, {insert} tags will not be cached. They will run
dynamically every time the page is created, even within cached
pages. This works good for things like banners, polls, live
weather, search results, user feedback areas, etc.