如何在Smarty中使用json_decode

Question

Its my first time working with Smarty Template Engine and I am having troubles translating the following PHP json_decode statement into a Smarty friendly code. The output is an array since I use the TRUE in the json_decode.

$itemArray = json_decode($dni-content-slider-id-prefix-saved-content-picker-item- . $promos, true)

I've tried

{ assign var  $itemArray = value=$dni-content-slider-id-prefix-saved-content-picker-item-|cat:$promos|json_decode}

But it doesnt really work. any suggestions?

Answer 1

Pretty much everything in that line of Smarty is wrong; let's go through in order:

{ assign

Don't put a space between the { and the Smarty tag; if Smarty 3's "auto-literal" feature is switched on, it will assume that's a literal { not a Smarty tag.

var  $itemArray = 

You seem to be mixing two different functions here. The Smarty {assign} function takes the form {assign var=some_name value=$some_value} . Note that the var parameter is the name of the variable to assign, so does not need a $ .

Smarty 3 also has a PHP-style "short-form assign" , which looks like {$some_name=$some_value} (complete with $ , but no assign keyword).

value=$dni-content-slider-id-prefix-saved-content-picker-item-|cat:$promos

This will take the content of the variable $dni-content-slider-id-prefix-saved-content-picker-item- treat it as a string, and add the content of the variable $promos (also treated as a string) to the end of it. Looking again, I see that that is also what your PHP code does, but it seems a very odd thing to do, since the first variable would have to be something like "{'foo':'bar'," and the second something like "'baz':'quux'}" . Why would you ever have variables like that?

Based on the PHP code being the same, I'm going to assume this paragraph was wrong on my part What I suspect you want is a variable variable name (a different variable when the code runs); there are ways to do that, but this isn't one of them. It's also generally a really bad idea; if you want lots of similar variables which you can select from at run-time, put them in an associative array, and index something like $dni-content-slider-id-prefix-saved-content-picker-items[$promos] .

|json_decode}

Finally, the part actually related to your question. You point out that in PHP, you pass the optional true parameter to the json_decode function, but in this Smarty code, you are not doing so. This can be easily done by adding :true on the end, as in {assign var=itemArray value=$jsonString|json_decode:true} .