how to make PHP interpret URL GET parameters as array?

Question

I'm trying to interpret an array url param in PHP, but it's interpreted as string instead of an array.

On client side, the url is generated with js: URL:

let url = window.location.href.split('?')[0] //example https://www.test.com

The get parameters are added with:

const params = encodeURIComponent(JSON.stringify(array));

url += "?array="+params;

for an example array of [1010,1020,1030], the final url looks like:

https://www.test.com?array=%5B%221010%22%2C%221020%22%2C%221030%22%5D

On server side (PHP), I'm using $_GET['array'] to get those data, the output looks like:

string(22) "["1010","1020","1030"]"

It is a syntactically correct array, but interpreted as string. I know, I could use some string manipulations to get the array I want, but is there a way, that I can get an array right from scratch?

@SebastianSimon, update: If i store the $_GET into a variable and json_decode the variable, it does not work, but if i json_decode the $_GET itself it works... now I feel stupid :) thanks — toffler
– toffler, Commented Dec 29, 2022 at 7:39

Phil · Accepted Answer · 2022-12-29 08:01:02Z

2

Either decode the current parameters as JSON...

$array = json_decode($_GET['array']);

or encode the array in a way PHP understands natively...

const params = new URLSearchParams();
array.forEach((val) => {
  params.append("array[]", val); // note the "[]" suffix
});
url += `?${params}`;

$array = $_GET['array'] ?? [];

answered Dec 29, 2022 at 8:01

Phil

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