sbsedv/input-converter

A minimal PHP component to nativly support user input parsing on http methods other than POST.

PHP natively only supports the parsing of multipart/form-data and application/x-www-form-urlencoded on POST http requests.

Many modern web applications also want use / support a) other http methods like PUT or PATCH and b) other content encodings like JSON or XML.

This component provides a very simple and extensible object oriented api to support just that.

Internally this component uses the PHP native functions json_decode and parse_str (multpart/form-data gets "translated" to x-www-form-urlencoded) and therefore complex data structures (arrays and objects) are only limited by what those functions support.
This effectifly means that HTMLForms like the following are FULLY supported.

<form method="PUT">
    <select name="select[]" multiple>
        ...
    </select>

    <input type="text" name="text" />

    <input type="text" name="obj[key1]" />
    <input type="text" name="obj[key2]" />
    <select name="obj[key3][]" multiple>
        ...
    </select>
</form>

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How it Works

You should instantiate and call this component as early in your app lifecycle as possible.

You MUST either pass a PSR-7 or HTTP-Foundation request wrapper object to the "convert" method.

<?php declare(strict_types=1);

use SBSEDV\InputConverter\InputConverter;
use SBSEDV\InputConverter\Request\HttpFoundationRequest;
use SBSEDV\InputConverter\Request\Psr7Request;

$request = new HttpFoundationRequest($request);
// $request = new Psr7Request($request);

try {
    (new InputConverter())
        ->addConverter(...) // your converters
        ->convert($request);
} catch (MalformedContentException $e) {
    // a converter supported the request
    // but encountered an error while parsing

    http_status_code(400);
    exit();
} catch (UnsupportedRequestException) {
    // no converter supported the request
}

The decoded body data is automatically added to the underlying Psr7 or Http-Foundation request object.

Caution: Psr7 request are immutable. You can get the new object by calling $request->getRequest().

---

Converters

The actual parsing is handled by converter classes that implement SBSEDV\InputConverter\Converter\ConverterInterface.

You can always implement your own converter.

By default we support three customisable converters:

SBSEDV\InputConverter\Converter\UrlEncodedConverter

Via its constructor you can influence which http methods it supports.

public function __construct(
    array $methods = ['PUT', 'PATCH', 'DELETE']
);

---

SBSEDV\InputConverter\Converter\JsonConverter

Via its constructor you can influence which content types and http methods it supports.

public function __construct(
    array $contentTypes = ['application/json'],
    array $methods = ['POST', 'PUT', 'PATCH', 'DELETE']
);

---

SBSEDV\InputConverter\Converter\FormDataConverter

Via its constructor you can influence which content types and http methods it supports.

Internally this uses the riverline/multipart-parser library for parsing.

public function __construct(
    array $methods = ['PUT', 'PATCH', 'DELETE'],
    bool $fileSupport = false
);