从javascript数组中获取一个值

Question

I'm sure there's something stupid I am doing and the answer to this is very simple but all the searches I have done have dealt with looping over the array, I don't want that.

I have an ajax call that is returning a response in the form of a very simple array. In the success function of my ajax call if I do this:

console.log(response);

The array is logged to the console as expected. [0] => 100, [1] => 200 etc.

If I try:

console.log(response[1]);

I am expecting to get 200 but it does nothing. I eventually want to insert the value into a redirect like this...

window.location.replace('index.php?id=200');

But all I get is "index.php?id="

Please someone put me out of my misery. What am I doing wrong?

Edit:

Changed the PHP to include the following:

exit(json_encode("id"=>$id,"message"=>$message));

which returned an object (not a string).

Then in the success part of the ajax function:

success: function(response) {
window.location.replace('index.php?id=' + response.id + '&message=' + response.message);
}

This... for some reason, works fine. Don't ask me why.

Answer 1

The easiest way of sending information to and from PHP/Javascript is with JSON.

In PHP you can use json_encode() to turn your array into a JSON string. Then use JSON.parse() in Javascript to turn the string back into an object.

If you are using jQuery for the AJAX request and don't have the dataType set it will automagically detect it is JSON and parse it for you, this is probably why you didn't have to.