Convert String to Eloquent functions - php

Question

I am building an API with laravel, so I am trying to pass Laravel's Eloquent functions as string and execute them in the controller, actually I am sending a JSON object but I am converting it to a string in backend, here is what I tried to do
API URL with parameters:
http://www.example.com/api/articles?parameters={"orderByDesc":"'created_at'", "limit":"2"}
Controller side:
$json = json_decode(request('parameters'), TRUE);
$query = '';
foreach ($json as $function => $value){
$query .= $function.'('.$value.')->';
}
$query = $query.'get();';
return $query;
Output:
orderByDesc('created_at')->limit(2)->get();
Now how can I execute this string as code on the model, example:
$articles = Article::orderByDesc('created_at')->limit(2)->get();
I couldn't concatenate like this: Article::.$query
And I can't use PHP's eval()
The idea is to use Laravel's Eloquent functions inside a JSON object and pass them in one URL parameter.
Thanks

Answer 1

Maybe you should try this.
$json = json_decode(request('parameters'), true);
$query = Article::query();
foreach($json as $function => $value){
$query->{$function}($value);
}
$query = $query->get();
return $query;
You can run function on object with ->{$func_name} syntax
Edit: You can pass multiple arguments too. But you can check if whether value is array or not:
foreach($json as $function => $value){
if(is_array($value)) {
$query->{$function}(...$value);
} else {
$query->{$function}($value);
}
}
In this case you can have: {"orderByDesc":"'created_at'", "limit":"2", "where": ["column_name", "LIKE", "%SOME_STRING"]} and it will generate query equivalent to: ->where('column_name', 'LIKE', '%SOME_STRING')