robryanx/reverse-print-r

Library to reverse print_r output to PHP objects, arrays and scalar values

Reverse print_r

This library provides six different handlers for reversing output of PHP's print_r function back to original variables. If there's no handler available for a type it's returned as string.

Assumptions

• all values should be type-casted, not returned as string
• empty string ("") is treated as null (see NullHandler)
• integers are treated as integers (no boolean support)
• multi-level array MUST be supported with type-casting
• public, protected and private properties of Objects MUST be supported with type-casting

Known issues

• no support for Object Inheritance

Installation

Package is available via Composer.

composer require simivar/reverse-print-r

Usage

<?php

$print_r_output = print_r([
    'string' => 'some text',
    'integer' => 1,
    'float' => 2.3,
    'subArray' => [
        'Hello World.',
    ],
], true);

$reverser = new \ReversePrintR\ReversePrintR($print_r_output);
echo $reverser->reverse()['float']; 
// outputs "2.3"

Changing behavior of Handlers

All handlers are defined as final, but thanks to Dependency Injection it's easy to change the behavior of library and it's type-casting. Let's say you want to keep all the empty strings "" as string, not null. All you have to do is create your own HandlerRunner without NullHandler.

<?php

$print_r_output = print_r([
    'string' => '',
    'null' => null,
], true);

$handlerRunner = new \ReversePrintR\HandlerRunner(
    new \ReversePrintR\Handler\FloatHandler(),
    new \ReversePrintR\Handler\IntegerHandler(),
    new \ReversePrintR\Handler\ArrayHandler(),
    new \ReversePrintR\Handler\ObjectHandler()
);

$reverser = new \ReversePrintR\ReversePrintR($print_r_output, $handlerRunner);
var_dump($reverser->reverse()['null']); 
// outputs ""

Own Handlers

The same way to removed NullHandler you can add your own handlers. All you have to do is make sure that it implements \ReversePrintR\Handler\HandlerInterface and you are good to go.

Versioning

Library is following Semver. All minor and patch updates are backwards compatible.

License

Please see the license file for more information.