解析结构化文本数据

Question

我在文本格式提取BLOB字段出来的MySQL表：

CAST(orders AS CHAR(10000) CHARACTER SET utf8) 

现在每场看起来是这样的：

a:2:{s:4:"Cart";a:5:{s:4:"cart";a:2:{i:398;a:7:{s:2:"id";s:3:"398";s:4:"name";s:14:"Some product 1";s:5:"price";i:780;s:3:"uid";s:5:"FN-02";s:3:"num";s:1:"1";s:6:"weight";s:1:"0";s:4:"user";s:1:"4";}i:379;a:7:{s:2:"id";s:3:"379";s:4:"name";s:14:"Some product 2";s:5:"price";i:750;s:3:"uid";s:5:"FR-01";s:3:"num";s:1:"1";s:6:"weight";s:1:"0";s:4:"user";s:1:"4";}}s:3:"num";i:2;s:3:"sum";s:7:"1530.00";s:6:"weight";i:160;s:8:"dostavka";s:3:"180";}s:6:"Person";a:17:{s:4:"ouid";s:6:"103-47";s:4:"data";s:10:"1278090513";s:4:"time";s:8:"21:33 pm";s:4:"mail";s:15:"mail@mailer.com";s:11:"name_person";s:8:"John Doe";s:8:"org_name";s:13:"John Doe Inc.";s:7:"org_inn";s:12:"667110804509";s:7:"org_kpp";s:0:"";s:8:"tel_code";s:3:"343";s:8:"tel_name";s:7:"2670039";s:8:"adr_name";s:26:"London, 221b, Baker street";s:14:"dostavka_metod";s:1:"8";s:8:"discount";s:0:"";s:7:"user_id";s:2:"13";s:6:"dos_ot";s:0:"";s:6:"dos_do";s:0:"";s:11:"order_metod";s:1:"1";}} 

我可以看到的是，该文云中顺序：[type]:[length]:[data];，其中[type]：小号代表串和一个代表数组（或Python中的字典）。它也有i:'number':组，没有[length]:。

虽然我不清楚如何解析嵌套字典（在Python术语中），但我没有看到比在几遍中用正则表达式解析它更好的解决方案。

问题：它是一个标准的数据结构，已经有一个解析器？

Answer 1

这看起来像是从PHP序列化功能输出（需要反序列化的话）：

http://php.net/manual/en/function.serialize.php

如果您在Python工作，没有这里的序列化和反序列化功能的端口：

https://pypi.python.org/pypi/phpserialize

Anatomy of a serialize()'ed value: 

String 
s:size:value; 

Integer 
i:value; 

Boolean 
b:value; (does not store "true" or "false", does store '1' or '0') 

Null 
N; 

Array 
a:size:{key definition;value definition;(repeated per element)} 

Object 
O:strlen(object name):object name:object size:{s:strlen(property name):property name:property definition;(repeated per property)} 

String values are always in double quotes 
Array keys are always integers or strings 
    "null => 'value'" equates to 's:0:"";s:5:"value";', 
    "true => 'value'" equates to 'i:1;s:5:"value";', 
    "false => 'value'" equates to 'i:0;s:5:"value";', 
    "array(whatever the contents) => 'value'" equates to an "illegal offset type" warning because you can't use an 
    array as a key; however, if you use a variable containing an array as a key, it will equate to 's:5:"Array";s:5:"value";', 
    and 
    attempting to use an object as a key will result in the same behavior as using an array will.