README

An example of an I/O library. This project shows an alternative to handling output through the router framework. Most router frameworks expect the output to be passed back in the controllers in a "return" statement. Then for example they would convert the array to JSON.

In my opinion that solution becomes too problematic, when changes and new output modes are introduced later on to the project. Routing and IO are better be separated into 2 distinct libraries.

Functions:

Help handling output buffering
Handy methods to change content type
Access HTTP/GET parameters in a type-safe manner.
Help with the JSON format (input / output)

Request	Response
Request::getPostedJson(): array	Response::printJson(array $json, $http_status_code = 200)
Request::getIntParameter(string $paramName): int	Response::bufferStart()
Request::getFloatParameter(string $paramName): float	Response::bufferEndClean()
Request::getStringParameter(string $paramName): string	Response::isBufferEnabled(): bool
Request::getBoolParameter(string $paramName): bool	Response::JsonContentType($http_status_code = 200)
Request::isParameterSet(string $paramName): bool	Response::HtmlContentType($http_status_code = 200)
Request::getHttpRequestMethod(): string	Response::TextContentType($http_status_code = 200)

For everything else, use the built-in functions of PHP.

Recommended IDE: PhpStorm

Packagist page: https://packagist.org/packages/tbolner/flex-php-io

Example usages

<?php declare(strict_types=1);

namespace MyProject;

use FlexPhpIO\Response;


Response::bufferStart();
Response::HtmlContentType();

echo '<html><body><p>Hello World!</p></body></html>';

<?php declare(strict_types=1);

namespace MyProject;

use FlexPhpIO\Request;
use FlexPhpIO\Response;

try {
    Response::bufferStart();

    $input_data = Request::getPostedJson();
    $message = @trim((string)$input_data["message"]);

    if ($message == "") {
        throw new \Exception("Missing or invalid 'message' field in input.");
    }

    Response::printJson([
        "status" => "ok",
        "message" => $message
    ]);

} catch (\Exception $ex) {
    Response::printJson([
        "status" => "error",
        "message" => $ex->getMessage();
    ], 400);
}

An example for using it in a controller of FlexPhpRouter:

project1/src/Controller/items.php

<?php declare(strict_types=1);

namespace MyProject\Controller;

use FlexPhpRouter\Router;
use FlexPhpIO\Response;


Router::get(
    "items/{id:int}/info",
    function (int $id) {
        Response::printJson([
            "item_id" => $id
        ]);
    }
);

Notes:

When the output buffering is enabled, then you can change the headers any time, even after you have printed some output.
When the output buffering is disable, then you cannot change the headers anymore after data was written to the output.
In the FlexPhpRouter example, the output buffering should've already been set up in the main initialization file or entry point.

Installation

{
    "require": {
        "tbolner/flex-php-io": "dev-master"
    }
}

Then execute:

composer update

This library requires PHP 7.1 or newer.

tbolner/flex-php-io

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