sending multidimensional array via ajax, index[0] problems

Question

I'm trying to send a multidimensional array from php to Javascript/jQuery but I'm having a problem.

When I'm sending index 0 via json_encode($array);, the client receives the response in the format I want:

[[0,0],[1,0.031410759078128],[2,0.062790519529313],[3,0.094108313318514].etc..]

When I inspect with firebug, the index 0 array sent doesn't seem to arrive with JSON?

When I send any other index of the array, the client receives the array in this format(which I don't want):

{"1":[1,0.031410759078128],"2":[2,0.062790519529313],"3":[3,0.094108313318514].etc..}

when I inspect the arrays received by the client when the index is anything other than 0, I can clearly see that it was sent using JSON.

What's the problem, and how can I get all of my indexed arrays sent using the same format as my array[0] ?

Here's my php code:

$strJEncoded = json_encode($array);
echo $strJEncoded;

Here's my JS/Jquery code:

$res = jQuery.parseJSON(response);

That second format is not a JSON array. It's an object with numeric keys whose values are themselves arrays. — CollinD
– CollinD, Commented Sep 7, 2016 at 23:17

Barmar · Accepted Answer · 2016-09-07 23:17:28Z

2

By default, json_encode() will only produce a JSON array if the array indexes are sequential numbers starting from 0. Otherwise, it produces a JSON object.

You can use array_values() to return an array with the indexes renumbered from 0.

$strJEncoded = json_encode(array_values($array));

answered Sep 7, 2016 at 23:17

Barmar

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2 Comments

D4v3 Over a year ago

Thank you, my client receives the correct array format now!

Kevin Over a year ago

@D4v3 you should accept check this answer if this did solve your problem

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