sending json from php to javascript

Question

I have a php variable which contain json, I use json_encode to transform an array to json.

If I print my var I have:

["L","M","M","J","V","S","D"]

But if I use my var in js I have:

["L","M","M","J","V","S","D"]

and I can't parse because I have an error

Uncaught SyntaxError: Unexpected token & 

Is there a way to get json in my js ?

Thanks

Edit:

In php

$dayArray = array('L','M','M','J','V','S','D');
$dayArray = json_encode($dayArray)

In js

setDayArray('<?php echo $dayArray ?>');
setDayArray = function(dayArray){
 console.log(dayArray);
}

With twig

calendar.setDayArray({{ dayArray }});

This is maybe due to symfony rendering, the only way I found is to do an ajax call using json header

• bwoebi: why did you use htmlentities/htmlspecialchars?
• Jason McCreary: Show how you are using the var in JavaScript.
• T.J. Crowder: @BadWolf: That's a very bad idea. Yes, don't use htmlentities. No, don't just output it directly.
• Ajouve: I edit my post with my code
• elclanrs: setDayArray('<?php $dayArray ?>'). That's your problem right there, you have to echo it out.

Answer 1

To output JSON in PHP, output the result of passing your PHP structure through json_encode.

Example from the documentation:

<?php
$arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
echo json_encode($arr);
?>

Outputs:

{"a":1,"b":2,"c":3,"d":4,"e":5}

---

Re your updated question, you've used

$dayArray = json_encode($dayArray)
setDayArray('<?php $dayArray ?>'); // Wrong

Get rid of the quotes, and include echo unless it's magically getting output some other way:

$dayArray = json_encode($dayArray)
setDayArray(<?php echo $dayArray ?>); // Right

When you do that, the browser will see something like:

setDayArray(["L","M","M","J","V","S","D"]); // Right

rather than

setDayArray('["L","M","M","J","V","S","D"]'); // Wrong

• Ajouve: I have the same problem setDayArray(["L","M","M","J","V","S","D"])

Answer 2

I find the solution

calendar.setDayArray({{ dayArray | raw }});

use raw to allow html