Question

In php I used json_encode(...) and then got the value in Javascript, looks as the following:

["float","float","float","float"]  // PS: This is a string...

And I would like to make this into a normal javascript array, like so:

Arr[0] // Will be float
Arr[1] // Will be float
Arr[2] // Will be float
Arr[3] // Will be float

How is this possible?

Answer 1

It sounds like you’re retrieving a JSON string in JavaScript (perhaps via AJAX?). If you need to make this into an actual array value, you’d probably want to use JSON.parse().

var retrievedJSON = '["float","float","float","float"]'; // normally from AJAX
var myArray = JSON.parse(retrievedJSON);

If you’re actually writing out a value into the page, rather than using AJAX, then you should be able to simply echo the output of json_encode directly, without quoting; JSON itself is valid JavaScript.

var myArray = <?php echo json_encode($myPhpArray); ?>;