Smarty: Is there a way to detect whether all expected variables were passed to the template?

Question

Let's say I have a smarty template file with the following content:

<div>
        var 1: {$var1}<br>
        var 2: {$var2}
</div>

and I do the following assignment where I forget to assign var2:

$smarty->assign("var1", "foo");
$smarty->display($tpl_file);

What is the best way to detect that not all the required variables were assigned?

Thank you.

The part in your code is missing where you actually (want to) detect that. — hakre, Mar 09 '12 at 00:16
Goes like this: Know which variables are needed, check if any of those have been assigned. See as well [How do I check to see if a Smarty variable is already assigned?](http://stackoverflow.com/questions/350129/how-do-i-check-to-see-if-a-smarty-variable-is-already-assigned) — hakre, Mar 09 '12 at 00:20
Maybe I should have phrased my question differently. I want Smarty to tell me which variables are needed. If I have that I can make sure I assign them all. — ppbitb, Mar 09 '12 at 00:24
Smarty won't tell you because you already told smarty by writing the template which variables are needed. So the only one who knows is you, not smarty. Smarty only knows in the moment the template is displayed. I guess that's too late for you then. You can find out by enabling error reporting. — hakre, Mar 09 '12 at 00:25

score 1 · Accepted Answer · answered Mar 09 '12 at 00:30

1

Smarty itself does not have such a function, you can try to write something your own like:

preg_match_all('/{\$(.*?)}/', file_get_contents('templates/index.tpl'), $vars, 2);

foreach ($vars as $v)
{
    echo $v[1]."<br>";
}

answered Mar 09 '12 at 00:30

hakre

1

I changed the regex to '/{\$([a-zA-Z0-9_]+)/' to handle cases like {$var:htmlescape} but that works for me – ppbitb Mar 09 '12 at 00:45

1 Answers1