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Dates

As a rule of thumb, always pass dates to Smarty as timestamps. This allows template designers to use the date_format modifier for full control over date formatting, and also makes it easy to compare dates if necessary.

Example 272. Using date_format


{$startDate|date_format}

    

This will output:


Jan 4, 2009

    

{$startDate|date_format:"%Y/%m/%d"}

    

This will output:


2009/01/04

    

Dates can be compared in the template by timestamps with:


{if $order_date < $invoice_date}
   ...do something..
{/if}

    

When using {html_select_date} in a template, the programmer will most likely want to convert the output from the form back into timestamp format. Here is a function to help you with that.

Example 273. Converting form date elements back to a timestamp



<?php

// this assumes your form elements are named
// startDate_Day, startDate_Month, startDate_Year

$startDate makeTimeStamp($startDate_Year$startDate_Month$startDate_Day);

function 
makeTimeStamp($year=''$month=''$day='')
{
   if(empty(
$year)) {
       
$year strftime('%Y');
   }
   if(empty(
$month)) {
       
$month strftime('%m');
   }
   if(empty(
$day)) {
       
$day strftime('%d');
   }

   return 
mktime(000$month$day$year);
}
?>

    

See also {html_select_date}, {html_select_time}, date_format and $smarty.now,

Smarty Template Engine