在emptyy中将空输入字段验证为正确的值

Question

<td><input type="text" name="remove" value="Remove this text"></td>

How can i use smarty validation directly in my template file. The correct value for the textbox is empty.

I'm trying to avoid using Javascript, and I know I can do it either in the template file or the PHP. I haven't seen any real good examples of this.

I'm confused, and I would appreciate some help.

Answer 1

You can not validate anything using smarty. Smarty is for templating, that means: Smarty is there for generating output solely.

If you want to check if that element is empty, you have to rely on javascript or your server-sided language, e.g. PHP.

The only way to to anything roughly in your direction with smarty would be like this:

<td>
    {if $element_not_empty}<div class="error">Please remove the text!</div>{/if}
    <input type="text" name="remove" value="Remove this text">
</td>

But, of course, the variable $element_not_empty would be generated by PHP so there you are at server-sided validation again ;)