Deliverance

Shared data transfer interfaces for PHP

Deliverance is a middleware library intended to be used by other framework systems that need to manage multiplex IO operations.

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Installation

Install via Composer:

composer require decodelabs/deliverance

Usage

Channels

Channels represent simple in / out handlers and can be written to and read from:

use DecodeLabs\Deliverance;

$stream = Deliverance::openStream('path/to/file');
$stream->writeLine('Hello world');

$stream = Deliverance::openCliOutputStream(); // Same as new Deliverance\Channel\Stream(STDOUT);

$buffer = Deliverance::newBuffer();
$buffer->write('Some text to buffer');
echo $buffer->read(6); // "Some t"

IO Broker

Channels can be grouped together and managed by an IO Broker -

use DecodeLabs\Deliverance;

// Create a CLI IO handler
$broker = Deliverance::newBroker()
    ->addInputProvider(Deliverance::openStream(STDIN))
    ->addOutputReceiver(Deliverance::openStream(STDOUT))
    ->addErrorReceiver(Deliverance::openStream(STDERR));

// Shortcut to the above:
$broker = Deliverance::newCliBroker();


// Read line from CLI
$broker->setReadBlocking(true);
$text = $broker->readLine();

// Write it back to output
$broker->writeLine('INPUT: '.$text);

Once grouped, the Channels in an IO broker can be used as the interface between many different information sources; see Systemic Unix process launcher for an example of an IO Broker managing input and output with proc_open().

Licensing

Deliverance is licensed under the MIT License. See LICENSE for the full license text.