Enabling browser cache
Sometimes it is wise to enable browser cache so that the web browser would rather use memory cached page than get it from the website. You could for example use this method to make browser to "remember" the form fields values when returning to the form after a warning message when the user has not filled all mandatory inputs.To do so, you need to send appropriate HTTP header to the browser. The following example sends correct header when the user is browsing object with ID = 1234 (eg. www.site.com/?id=1234) and the current user is not content editor.
{* You need to insert this code BEFORE the <!doctype..> declaration and <html> tag *}
{* The page is cached in browser for 300 seconds *}
{if $id == 1234 && !$admin}
{assign var="max_age" value=300}
{assign var="date_format" value="D, d M Y H:i:s"}
{assign var="Last_Modified" value=$date_format|@date:$smarty.now}
{math equation="x + y" x=$smarty.now y=$max_age assign="Expires"}
{assign var="Expires" value=$date_format|@date:$Expires}
{insert name=header content="Pragma: public"}
{insert name=header content="Last-Modified: `$Last_Modified` GMT"}
{insert name=header content="Expires: `$Expires` GMT"}
{insert name=header content="Cache-Control: public, max-age=`$max_age`, pre-check=`$max_age`"}
{/if}
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