Call JavaScript Function from Symfony Component

Question

I have created a new JSON string (by converting a PHP array using json_encode) and stored it in $siteTree ... outputting it to the log shows the following

[
{
    "attr": {
        "id": "node_1",
        "rel": "folder"
    },
    "data": "New Title",
    "children": [
        {
            "attr": {
                "id": "node_2",
                "rel": "folder"
            },
            "data": "second document",
            "children": []
        }
    ]
}

]

So I know the JSON is formed correctly. What I am trying to do is use that variable in a javascript function to create an object using the JSON data ... I am doing the following in the template

<?php
    use_helper('JavascriptBase');
    echo javascript_tag('createTree('.$siteTree.')');
?>

The following is shown on the output page

createTree([{&quot;attr&quot;:{&quot;id&quot;:&quot;node_1&quot;,&quot;rel&quot;:&quot;folder&quot;},&quot;data&quot;:&quot;New Title&quot;,&quot;children&quot;:[{&quot;attr&quot;:{&quot;id&quot;:&quot;node_2&quot;,&quot;rel&quot;:&quot;folder&quot;},&quot;data&quot;:&quot;second document&quot;,&quot;children&quot;:[]}]}])

The function is called but the JSON has replaced the " with &quote;. How can I stop this ?

Thanks for your help !

@DrMolle: It is a symfony function: trac.symfony-project.org/browser/branches/1.4/lib/helper/… — Felix Kling
– Felix Kling, Commented Jan 22, 2011 at 10:26
Sorry - I have updated the post title ... also found this-> stackoverflow.com/questions/4763413/… but im running this from a component and the renderText method is not available in a component — Manse
– Manse, Commented Jan 22, 2011 at 10:27
You have to be carful with terminology here. json_decode generates JSON, the way you currently insert it into JavaScript will make it a JavaScript object (actually an array in your case). I'm sure that is what you want, I just wanted to clarify that. — Felix Kling
– Felix Kling, Commented Jan 22, 2011 at 10:28

Dan Grossman · Accepted Answer · 2011-01-22 10:29:52Z

2

Symfony automatically performs output escaping to help prevent several types of XSS attacks.

You can disable it by configuration, or depending on what version of the Symfony framework you're using, access the raw data in your view like this:

$sf_data->getRaw('siteTree')

e.g.

echo javascript_tag('createTree(' . $sf_data->getRaw('siteTree') . ')');

If that doesn't work for you, you should find the relevant references you need by consulting the Symfony documentation for your version of the framework, searching for "output escaping".

answered Jan 22, 2011 at 10:29

Dan Grossman

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3 Comments

Manse Over a year ago

Now i get -> Notice: Undefined index: [{"attr":{"id":"node_1","rel":"folder"},"data":"New Title","children":[{"attr":{"id":"node_2","rel":"folder"},"data":"second document","children":[]}]}]

Dan Grossman Over a year ago

Considering I didn't give you any code that accesses an array, I think you will have to clarify where that error is coming from.

Manse Over a year ago

The variable $siteTree contains the first section of code in my post above. That was the resultif running Json_encode on an array

Manse · Accepted Answer · 2011-01-22 17:19:07Z

0

OK .. So I managed to fix the problem ... this is how I did it ...I forgot about the json_encode and just passed an array up to the template of the component.

Within the template i processed it like this

echo javascript_tag('createTree('.json_encode($siteTree->getRawValue()).');');

This then output the correct JavaScript.

Thanks for everyones assistance ! Got there in the end

answered Jan 22, 2011 at 17:19

Manse

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