Table of Contents
1、引言
2、binary扩展简介
2.1、这个binary扩展导出了以下三个函数:
2.2、binary扩展模块下载地址:
3、binary扩展的安装
4、binary扩展应用示例
4.1、创建mysql数据表
4.2、在Erlang端写入数据
4.3、在PHP中读取并解包成PHP数组
4、小结
Home Backend Development PHP Tutorial PHP扩充模块解包(由term_to_binary生成的)Erlang ext term格式的二进制数据

PHP扩充模块解包(由term_to_binary生成的)Erlang ext term格式的二进制数据

Jun 13, 2016 pm 12:34 PM
erlang php quot

PHP扩展模块解包(由term_to_binary生成的)Erlang ext term格式的二进制数据

1、引言

《初探Erlang的term_to_binary数据封包机制》一文中已经介绍了Erlang扩展term格式(Erlang external term format)binary的作用,
有些同学想把Erlang数据通过term_to_binary函数封包后以二制进形式存入数据库,然后用PHP读取并解包成PHP数组。
为了解决上面的这种应用场合中遇到的问题,
参考peb(Php-Erlang Bridge)扩展写了这个类似erlang:binary_to_term/1函数功能的binary扩展,
可以理解为是PHP版的binary_to_term。

2、binary扩展简介


2.1、这个binary扩展导出了以下三个函数:

  1. array binary_to_term(string $binary) 返回解包后的数组。
  2. int binary_errno () 返回上次调用binary_to_term产生的错误代号。0为无错语,1为二进制内容中出现在不支持的数据类型。
  3. string binary_error () 返回上次调用binary_to_term产生的错误信息,如果没有出错则为空。

2.2、binary扩展模块下载地址:

http://download.csdn.net/download/u011471961/6447631

3、binary扩展的安装


Install On *nux:

Step 1:
---------
unzip binary.zip
cd ./binary
phpize或phpize5


Step 2:
---------
执行configure前先确认Erlang安装目录和php-config路径,下面的configure只是示例,可根据实际路径修改。
在linux下安装:
./configure CC="gcc -L/usr/local/lib/erlang/lib/erl_interface-3.7.11/lib -I/usr/local/lib/erlang/lib/erl_interface-3.7.11/include" --enable-binary --with-php-config=/usr/local/php/bin/php-config
OR:
./configure CC="gcc -L/usr/local/lib/erlang/lib/erl_interface-3.7.11/lib -I/usr/local/lib/erlang/lib/erl_interface-3.7.11/include" --enable-binary --with-php-config=/usr/bin/php-config5
在苹果电脑上安装:
sudo MACOSX_DEPLOYMENT_TARGET=10.7 CFLAGS="-arch i386 -arch x86_64 -g -Os -pipe -no-cpp-precomp" CCFLAGS="-arch i386 -arch x86_64 -g -Os -pipe" CXXFLAGS="-arch i386 -arch x86_64 -g -Os -pipe" LDFLAGS="-arch i386 -arch x86_64 -bind_at_load" ./configure CC="gcc -m32 -L/usr/local/lib/erlang/lib/erl_interface-3.7.6/lib -I/usr/local/lib/erlang/lib/erl_interface-3.7.6/include" --enable-binary


Step 3:
---------
make


Step 4:
---------
make test


Step 5:
---------
make install


Step 6:
---------
修改php.ini文件:
extension=binary.so
OR:
extension=/path/to/binary.so


Step 7:
---------
重启php-cgi或apache


Step 8:
---------
通过phpinfo()函数或命令(php -m)查看是否加载了binary模块。


4、binary扩展应用示例


4.1、创建mysql数据表

CREATE TABLE IF NOT EXISTS `test` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `bin` varbinary(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
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4.2、在Erlang端写入数据

test() ->
    Data = [{name, rolong},{phone, 888888}],
    Bin = term_to_binary(Data),
    %% 写入数据库的接口依自己情况而定
    db:execute(>, [Bin]).
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4.3、在PHP中读取并解包成PHP数组

<?php $sql = "select `bin` from test order by id desc limit 1";
    %% 读取数据库的接口依自己情况而定
    $bin = Db::getInstance()->getOne($sql);
    $data = binary_to_term($bin);
    echo '<pre class="brush:php;toolbar:false">';
    var_dump($data);
    echo '
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';
输出
array(1) {
  [0]=>
  array(2) {
    [0]=>
    array(2) {
      [0]=>
      string(4) "name"
      [1]=>
      string(6) "rolong"
    }
    [1]=>
    array(2) {
      [0]=>
      string(5) "phone"
      [1]=>
      int(888888)
    }
  }
}
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4、小结

在binary扩展模块中,部分较少用的数据类型暂末支持,有特殊需要的同学可以在源码中自行修改实现。
Erlang提供了数据封包、解包的C接口,可参考 http://www.erlang.org/doc/apps/erl_interface/index.html
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