Default form_params for guzzle 6 - php

Question

Is there a way to globally add form_params to all requests with guzzle 6?
For example:
$client = new \GuzzleHttp\Client([
'global_form_params' => [ // This isn't a real parameter
'XDEBUG_SESSION_START' => '11845',
'user_token' => '12345abc',
]
]);
$client->post('/some/web/api', [
'form_params' => [
'some_parameter' => 'some value'
]
]);
In my ideal world, the post would have the result of array_merge-ing global_form_params and form_params:
[
'XDEBUG_SESSION_START' => '11845',
'user_token' => '12345abc',
'some_parameter' => 'some value',
]
I can see also wanting something like this for query or json

Answer 1

According to Creating a client you can set "any number of default request options" and on the GuzzleHttp\Client Source Code
$client = new Client['form_params' => [form values],]);
would apply your form_params to every request.
This could create issues with GET requests due to the Content-Type header being changed within Client::applyOptions. It would ultimately depend on server configuration.
If your intentions are to have the client make both GET and POST requests then you might be better served by moving the form_params into middleware. For example:
$stack->push(\GuzzleHttp\Middleware::mapRequest(function (RequestInterface $request) {
if ('POST' !== $request->getMethod()) {
// pass the request on through the middleware stack as-is
return $request;
}
// add the form-params to all post requests.
return new GuzzleHttp\Psr7\Request(
$request->getMethod(),
$request->getUri(),
$request->getHeaders() + ['Content-Type' => 'application/x-www-form-urlencoded'],
GuzzleHttp\Psr7\stream_for($request->getBody() . '&' . http_build_query($default_params_array)),
$request->getProtocolVersion()
);
});