Return Multiples Array in JavaScript from PHP

Question

In php I return this from a function:

return json_encode(array($array1, $array2, $array3, $array4));

Each array contains single elements, loaded lke this:

while ($obj = $DB->next($res)) {
    $array1[] = $obj->the_data;
}

Now in JavaScript, I alert data[0], it shows me "["

Of course the entire data looks similar to this:

[["element1", "element2", "element3"],["element1", "element2", "element2" ... etc

Am I loading the array's incorrectly in php? or am I parsing them incorrectly in JavaScript?

this is being returned in a jQuery Ajax .post call.
I also am using this question as a reference

Did you set the dataType-argument to "json" in the $.post call? — friedi
– friedi, Commented Nov 12, 2014 at 20:52

Quentin · Accepted Answer · 2014-11-12 20:46:57Z

4

It looks like the data is a string instead of an array. This suggests that you aren't decoding the JSON.

jQuery will do that automatically if the response from the server is marked as JSON.

By default PHP marks responses as HTML, you need to explicitly say you are returning JSON:

header("Content-Type: application/json");

answered Nov 12, 2014 at 20:46

Quentin

948k136 gold badges1.3k silver badges1.4k bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

TheLettuceMaster Over a year ago

Ugh, you are correct. I completely forgot about this }, 'json'); param in my .post call. I had nothing whcih I guess defaults to text or html.

Quentin Over a year ago

@KickingLettuce — jQuery defaults to "Believing the server". Overriding that is a hack to get around the server lying about what it is returning. You should set the content-type header of the response.

TheLettuceMaster Over a year ago

Had no idea, I thought that was perfectly legitimate. Not sure where I would put the header call in my php file. It has many functions being used for ajax returns. Not all are encoded with json.

Quentin Over a year ago

You might want to look at the MVC pattern.

Collectives™ on Stack Overflow

Return Multiples Array in JavaScript from PHP

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related