如何使用Javascript向PHP服务器发送空数组

Question

I need to receive a PHP empty array via a form-data request. The notation expected from the body by the PHP server is this: filters[] . But when I send an empty array from JS I receive this filters: "" .

My sending method:

 var filters = new Array();
 var body = "filters="+filters;
 request.send(body);

So, there's a way to acomplish that naturally in Javascript?

Answer 1

Small change could work for you

var filters = new Array();
var body = "filters[]="+filters; //added [] to filters
request.send(body);

Answer 2

Best possible method is converting array/json to string using

var dataAsString = JSON.stringify(array);

then from string you have to retrieve array in PHP. Refer link to know how to convert String back to JSON.

Answer 3

The URL Parameters should look like this:

http://example.com/?filter[]=1&filter[]=2

Or

http://example.com/?filter[0]=1&filter[1]=2

etc

As an alternative you could JSON encode a parameter, but then using POST parameters would be the better choice.

Answer 4

I solved this by sending with the given notation:

if (!filters || filters.length === 0) {
    filters = [""];
}

When the filters are empty. And an object when the filters are not empty.