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Assign Value to Element of Array

 
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kenzor
Smarty Rookie


Joined: 17 Feb 2004
Posts: 9

PostPosted: Thu Feb 09, 2006 2:37 am    Post subject: Assign Value to Element of Array Reply with quote

I needed a way to create arrays from within the template, or assign a value to an array element so I created the assignel function.

Usage: {{assignel var=myarray key=1 value='myvalue'}}

If the specified var does not exist, or is not an array a new array with only one element (the one you specify with key and value) will be created.

Code:

function smarty_function_assignel ($_params, &$_smarty)
{
    if (!isset($_params['var'])) {
        $_smarty->trigger_error("assignel: missing 'var' parameter", E_USER_ERROR, __FILE__, __LINE__);
        return;
    }
   
   if (!isset($_params['key'])) {
        $_smarty->trigger_error("assignel: missing 'key' parameter", E_USER_ERROR, __FILE__, __LINE__);
        return;
    }
   
   if (!isset($_params['value'])) {
        $_smarty->trigger_error("assignel: missing 'value' parameter", E_USER_ERROR, __FILE__, __LINE__);
        return;
    }
   
   if (isset($_smarty->_tpl_vars[$_params['var']]) && is_array($_smarty->_tpl_vars[$_params['var']])) {
      $var = $_smarty->_tpl_vars[$_params['var']];
   } else {
      $var = array();
   }
   
   $var[$_params['key']] = $_params['value'];
   
   $_smarty->assign($_params['var'], $var);
}


Aside: A lot of people keep saying that you should really be creating your arrays in your PHP but I am sticking to a strict MVC approach. In my case it is only because of the way I wish to display the information that an array is required, so given a different look you wouldn't need the array. Therefore the array construction must be in the template, not in PHP.

(Updated to reference $_smarty correctly when throwing errors)
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dodtracker
Smarty n00b


Joined: 17 Jun 2007
Posts: 4

PostPosted: Mon Jun 18, 2007 4:22 am    Post subject: perfect! Reply with quote

Thanks! I'm using this in my application.

Template logic can require the use of arrays; for example, I'm showing the most popular item in each category from a list of categories. But, since each item can be in multiple categories and, since I want to show a different item per category, I need to save an array of already-used items.

The category-inclusion logic is something that can't (and shouldn't) be done at the template level, it's complicated and proprietary to the data.

Anyway, appreciate it!
Ben
http://www.dodtracker.com/
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boots
Administrator


Joined: 16 Apr 2003
Posts: 5613
Location: Toronto, Canada

PostPosted: Mon Jun 18, 2007 4:33 pm    Post subject: Reply with quote

http://www.phpinsider.com/smarty-forum/viewtopic.php?t=220
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