Smarty

[saiful]

Hello every one, hope all of you passing nice days. I need a small help.
I am very new in smapty. I am using smarty with codeigniter first time. Now i have a problem to find the difference between two date. Join date and resign comes from a for loop. I attach my code block here.
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{foreach $data.exp_info as $exp}
{assign var="ex_join_year" value="{$exp->ex_join_year}"}
{assign var="ex_resign_year" value="{$exp->ex_resign_year}"}
{assign var="ex_join_month" value="{$exp->ex_join_month}"}
{assign var="ex_resign_month" value="{$exp->ex_resign_month}"}

{php}

$date1 = $smarty->get_template_vars('ex_join_year');
$date2 = $smarty->get_template_vars('ex_resign_year');

//$date1 = "2007-Jan"; sample date
//$date2 = "2007-feb"; sample date

$diff = abs(strtotime($date2) - strtotime($date1));

$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));

printf("%d years, %d months\n", $years, $months);
{/php}
{/foreach}

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ex_join_year, ex_resign_year, ex_join_month, ex_resign_month
they are smarty template variable, so i cant use them directly under {php}.......{/php}. But i need some run time process using those variables to calculate difference between two days.
it shows error when i assign those template variables inside {php}......{/php}
it generates these errors

A PHP Error was encountered
Severity: Notice
Message: Undefined variable: smarty
Filename: plugins/block.php.php(23) : eval()'d code

Line Number: 3
Fatal error: Call to a member function get_template_vars() on a non-object in C:\wamp\www\hms\application\libraries\smarty\libs\plugins\block.php.php(23) : eval()'d code on line 3

Thanks every one

[U.Tews]

Inside compiled templates the Smarty or Template object must be accessed by an internal special name $_smarty_tpl

like

[saiful]

Hello U.Tews

I tried this,
$_smarty_tpl->get_template_vars('ex_join_year');

But my problem not solved.

i coded like this: $date1 = $_smarty_tpl->get_template_vars('ex_join_year');

and it shows the following errors.

------------------------------------------------------------------------
A PHP Error was encountered

Severity: Notice

Message: Undefined variable: _smarty_tpl

Filename: plugins/block.php.php(23) : eval()'d code

Line Number: 8
-----------------------------------------------------------------------

[U.Tews]

Sorry, I was wrong at my last reply.

{php} {/php} is implemented in SmartyBC like a block plugin.

Within that the template object is accessable with $template and the Smarty object with $template->smarty.

So use