I've been creating a lot of webservices API endpoints in Joomla 4 lately and wanted to ask: "What's the simplest, fastest, most practical way to get the entire POST object when a controller method gets the incoming request for Joomla 3 & 4. Assume JSON (no HTML forms or XML) and no Joomla filtering".

I've tried to directly decode the POST superglobal i.e.
$req = json_decode( $_POST ) (generally bad practice to bypass J! entirely).

I've also tried the same with $_REQUEST to no avail. (again bad practice).

Here is the code I've come up with after crawling through the core classes:

$req = json_decode( $this->input->json->getRaw() );

That will take the raw json string and produce an isomorphic PHP object easily accessible via -> e.g.
$req->action, or $req->data->id

If you want an associative array (hashmap) as the output, then try this:

$req = json_decode( $this->input->json->getRaw(), true);

The above code will produce a similar isomorph of the JSON object, as an associative array. e.g.
$req["action"], or $req["data"]["id"]

Of course, being a hashmap, the latter option allows you to substitute keys with variables i.e.

I'm asking this (and asking for other working techniques of accessing the POST object in J! 3 & 4 (leaving 1.5 & 2.5 behind)) as the following references and SO Q/A pages were unhelpful (their solutions didn't yield access to the POST object at all).

Deprecated Joomla docs: https://docs.joomla.org/Retrieving_request_data_using_JInput

SO Q/A with answers mostly addressing EOL J! versions: What's the proper way to get the entire $_POST?

Does anyone know of a working technique for J! 3 & 4 that returns the full JSON POST object?


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.