JSON - proper way to decode string in JavaScript

Question

I'm wondering what would be the best way to decode JSON string inside Javascript code.

I want my json string to be embeded inside my JS, like this:

var params = dojo.fromJson('<?=json_encode($this->params); ?>');

dojo.fromJson decodes my string and json_encode is a php function that encodes an object on the server side.

It seems that json encoder ignores ' chars and only converts " to \\". So when one of my variables inside $this->params contains a ' character there is a Javascript error.

For example:

var params = dojo.fromJson('{"id":"11","object_type":"Let's go"}');

What is the best way to approach this ?

Thanks for help.

Answer 1

Since you are producing the JSON yourself, you can trust it, so you don't need to treat it as JSON and can treat it as JS instead.

var params = <?=json_encode($this->params); ?>;

PHP's JSON encoder will escape </script> for you so you don't need to worry about terminating your script element with your data.