How to Debug Variables in Smarty like in PHP var_d

问题:

I have some variables inside a template and I don't know where I assigned them. I need to know what is inside a particular variable; for instance, say I have a variable in smarty called member. I tried with {debug} but it didn't work, and no popup was shown.

How can I output/debug smarty variables using something like var_dump() inside the templates?

回答1:

You can use {php} tags

Method 1 (won't work in Smarty 3.1 or later):

{php}

$var =
$this->get_template_vars('var');
var_dump($var);

{/php}

Method 2:

{$var|@print_r}

Method 3:

{$var|@var_dump}

回答2:

This should work:

{$var|@print_r}

or

{$var|@var_dump}

The @ is needed for arrays to make smarty run the modifier against the whole thing, otherwise it does it for each element.

回答3:

For what it's worth, you can do {$varname|@debug_print_var} to get a var_dump()-esque output for your variable.

回答4:

just use {debug} in your .tpl and look at your sourcecode

回答5:

In new Smarty it is:

<pre>
{var_dump($variable)}
</pre>

回答6:

Try out with the Smarty Session:

{$smarty.session|@debug_print_var}

or

{$smarty.session|@print_r}

To beautify your output, use it between <pre> </pre> tags

回答7:

If you want something prettier I would advise

{"<?php\n\$data =\n"|@cat:{$yourvariable|@var_export:true|@cat:";\n?>"}|@highlight_string:true}

just replace yourvariable by your variable

回答8:

try this .... Set $debugging to TRUE in Smarty.

回答9:

To debug in smarty in prestashop 1.6.x :

{ddd($variable)} -> debug and die

{ppp($variable)} -> debug only

An onther usefull debug tag :

{debug}

回答10:

in smarty V3 you can use this

{var_dump($variable)}

回答11:

In smarty there is built in modifier you could use that by using | (single pipeline operator). Like this {$varname|@print_r} will print value as print_r($php_variable)

回答12:

I prefer to use <script>console.log({$varname|@json_encode})</script> to log to the console.