making a json object in php that is parsable by javascript

Question

I have a huge list of things with each of those things broken down into four sub-things. I am easily able to gather them in nested arrays in PHP, but when I use json_encode to pass them as a JSON object to my javascript client side, the JSON.parse() function always fails because my data is filled with all kinds of entities like ' / \ " & % {} []

It's a shame there is no constant that you can add to json_encode to ensure it's javascript ready.

What characters must I escape or otherwise deal with to ensure I get a javascript parsable object. I was unable to find one. I could easily write a function to handle this if I knew which characters to deal with.

gizmore · Accepted Answer · 2021-11-27 06:11:46Z

1

There should be no problem with your approach. Maybe there is a problem when rendering the data? Did you try the following to output the json?

echo 'var myjs = ' . htmlspecialchars(json_encode($obj)) . ';';

If you render the json in a different url/endpoint you do not have to encode anything yourself. However you should make sure your http headers are set correctly

header('Content-Type: application/json');
echo json_encode($obj);
die(0); # thx for requesting my endpoint

answered Nov 27, 2021 at 6:11

gizmore

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2 Comments

pathfinder Over a year ago

I was just passing the nested array as json_encode($array). I will try the htmlspecialcharacters approach. And I like the idea of grabbing the object after page load, I may just do that. It may end up that way anyways. Thanks!

pathfinder Over a year ago

htmlspecialcharacters didn't work. I just passed it directly as a var as you said without using JSON.parse, and it all worked fine. In the end I built a small php function to create a javascript array of objects and pushed it into the javascript var and it all works great, no worry about special characters at all.

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