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98 lines
2.8 KiB
Markdown
98 lines
2.8 KiB
Markdown
This directory contains the Protocol Buffers runtime implementation via both a
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pure PHP package and a native c extension. The pure PHP package is intended to
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provide usability to wider range of PHP platforms, while the c extension is
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intended to provide higher performance. Both implementations provide the same
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runtime APIs and share the same generated code. Users don’t need to re-generate
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code for the same proto definition when they want to switch the implementation
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later.
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Both implementations make use of generated PHP code that defines message and
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enum types in PHP. We strongly recommend using protoc's PHP generation support
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with .proto files. The build process in this directory only installs the
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extension/package; you need to install protoc as well to have PHP code
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generation functionality.
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## Requirements
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To use PHP runtime library requires:
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- C extension: PHP 5.5.x or 5.6.x.
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- PHP package: PHP 5.5, 5.6 or 7.
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## Installation
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### C Extension
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#### Prerequirements
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To install the c extension, the following tools are needed:
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* autoconf
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* automake
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* libtool
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* make
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* gcc
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* pear
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* pecl
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On Ubuntu, you can install them with:
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```
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sudo apt-get install php-pear php5-dev autoconf automake libtool make gcc
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```
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On other platforms, please use the corresponding package managing tool to
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install them before proceeding.
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#### Installation from Source (Building extension)
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To build the c extension, run the following command:
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```
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cd ext/google/protobuf
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pear package
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sudo pecl install protobuf-{VERSION}.tgz
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```
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#### Installation from PECL
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When we release a version of Protocol Buffers, we will upload the extension to
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[PECL](https://pecl.php.net/). To use this pre-packaged extension, simply
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install it as you would any other extension:
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```
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sudo pecl install protobuf-{VERSION}
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```
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### PHP Package
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#### Installation from composer
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Simply add "google/protobuf" to the 'require' section of composer.json in your
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project.
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### Protoc
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Once the extension or package is installed, if you wish to generate PHP code
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from a `.proto` file, you will also want to install the Protocol Buffers
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compiler (protoc), as described in this repository's main `README` file. The
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version of `protoc` included in the latest release supports the `--php_out`
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option to generate PHP code:
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```
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protoc --php_out=out_dir test.proto
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```
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## Usage
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For generated code:
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https://developers.google.com/protocol-buffers/docs/reference/php-generated
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Known Issues
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------------
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* Missing native support for well known types.
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* Missing support for proto2.
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* No API provided for clear/copy messages.
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* No API provided for encoding/decoding with stream.
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* Map fields may not be garbage-collected if there is cycle reference.
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* No debug information for messages in c extension.
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* HHVM not tested.
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* C extension not tested on windows, mac, php 7.0.
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* Message name cannot be Empty.
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