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76 lines
3.1 KiB
Markdown
76 lines
3.1 KiB
Markdown
# PHPStruct class
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[![Build Status](https://travis-ci.org/danog/PHPStruct.svg?branch=master)](https://travis-ci.org/danog/PHPStruct)
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[![Codacy Badge](https://api.codacy.com/project/badge/Grade/7b91e30ec89a4313bdb34766ea990113)](https://www.codacy.com/app/daniil-gentili-dg/PHPStruct?utm_source=github.com&utm_medium=referral&utm_content=danog/PHPStruct&utm_campaign=Badge_Grade)
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[![License](https://img.shields.io/packagist/l/danog/phpstruct.svg?maxAge=2592000?style=flat-square)](https://opensource.org/licenses/MIT)
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[![Packagist download count](https://img.shields.io/packagist/dm/danog/phpstruct.svg?maxAge=2592000?style=flat-square)](https://packagist.org/packages/danog/phpstruct)
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[![Packagist](https://img.shields.io/packagist/v/danog/PHPStruct.svg?maxAge=2592000?style=flat-square)](https://packagist.org/packages/danog/phpstruct)
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[![HHVM Status](http://hhvm.h4cc.de/badge/danog/phpstruct.svg?style=flat-square)](http://hhvm.h4cc.de/package/danog/phpstruct)
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[![StyleCI](https://styleci.io/repos/62454134/shield)](https://styleci.io/repos/62454134)
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Licensed under MIT.
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PHP implementation of Python's struct module.
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This library was created to help me develop a [client for the mtproto protocol](https://github.com/danog/MadelineProto).
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It supports php 5.6, php 7 and HHVM.
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The functions and the formats are exactly the ones used in python's struct
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(https://docs.python.org/3/library/struct.html)
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This library can be used to pack/unpack strings, ints, floats, chars and bools into bytes.
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It has lots of advantages over PHP's native implementation of pack and unpack, such as:
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* Custom byte endianness.
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* Lots of useful formats that aren't present in the native implementation.
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* The syntax of the format string of pack and unpack is the same as in python's struct module.
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* The result of unpack is normal numerically indexed array that starts from 0 like it should.
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* The result of unpack has type casted values (int for integer formats, bool for boolean formats, float for float formats and string for all of the other formats).
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* The calcsize function is implemented.
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* The q and Q formats can be used even on 32 bit systems (the downside is limited precision).
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* Padding is supported for the @ modifier.
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For now custom byte size may not work properly on certain machines for the f and d formats.
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## Installation
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Install using composer:
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```
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composer require danog/phpstruct
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```
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# Usage
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Dynamic (recommended)
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```
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require('vendor/autoload.php');
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$struct = new \danog\PHP\StructClass();
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$pack = $struct->pack("2cxi", "ab", 44);
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$unpack = $struct->unpack("2cxi", $pack);
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var_dump($unpack);
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$count = $struct->calcsize("2cxi");
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```
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Dynamic (while specifying format string during istantiation)
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```
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require('vendor/autoload.php');
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$struct = new \danog\PHP\StructClass("2cxi");
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$pack = $struct->pack("ab", 44);
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$unpack = $struct->unpack($pack);
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var_dump($unpack);
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$count = $struct->size;
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$formatstring = $struct->format;
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```
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Static
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```
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require('vendor/autoload.php');
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$pack = \danog\PHP\Struct::pack("2cxi", "ab", 44);
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$unpack = \danog\PHP\Struct::unpack("2cxi", $pack);
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var_dump($unpack);
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$count = \danog\PHP\Struct::calcsize("2cxi");
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```
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[Daniil Gentili](http://daniil.it)
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