How can I judge a variable whether is assign in Smarty template?

Question

I have a smarty project. in the php file I will assign the variable bar dynamically.

in the php file's corresponding template:

{if $bar}{$bar}{/if}

but I will get bellow error:

Notice: Undefined index: bar in /Users/sof/Desktop/TestIOS/smarty-test02/templates_c/6f98597c1882f0124e0891c8343f1404eff83e24_0.file.test.tpl.cache.php on line 63

Notice: Trying to get property of non-object in /Users/sof/Desktop/TestIOS/smarty-test02/templates_c/6f98597c1882f0124e0891c8343f1404eff83e24_0.file.test.tpl.cache.php on line 63

How can I judge a variable whether is assign?

Possible duplicate of [How to verify if $\_GET exists?](https://stackoverflow.com/questions/12019684/how-to-verify-if-get-exists) — Alex, Jul 20 '18 at 06:48

score 1 · Accepted Answer · answered Jul 20 '18 at 06:39

1

You can use PHP's isset function.

{if isset($bar)}{$bar}{/if}

answered Jul 20 '18 at 06:39

wobsoriano

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But this is in smarty template, does this is use PHP's isset? or the smarty template grammar's isset? – sof-03 Jul 20 '18 at 06:42
Try it and you will know. It uses PHP's isset. – wobsoriano Jul 20 '18 at 06:44

How can I judge a variable whether is assign in Smarty template?

1 Answers1