php如何设置p3p头

php如何设置p3p头，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。

php设置p3p头的方法：1、编辑HOST，加入"127.0.0.1 www.a.com"；2、创建a_setcookie.php和a_getcookie.php等文件；3、通过header设置p3p头即可。

本文操作环境：windows7系统、PHP7.1版、Dell G3电脑。

php怎么设置p3p头？

PHP 通过设置P3P头来实现跨域访问COOKIE

我的是CentOS的系统(Linux 内核)

编辑HOST

vi /etc/hosts

加入

127.0.0.1        www.a.com127.0.0.1        www.b.com

首先：创建 a_setcookie.php 文件，内容如下：

然后：创建 a_getcookie.php 文件，内容如下：

最后：创建 b_setcookie.php 文件，内容如下：

－－－－－－－－－－－－－－－－－－－－－－－－－－－－

三个文件创建完毕后，我们通过浏览器依次访问：

http://www.b.com/b_setcookie.phphttp://www.a.com/a_getcookie.php

我们会发现，在访问b.com域的时候，我们并没有在a.com域设置上cookie值。

然后我们修改一下a_setcookie.php文件，去掉注释符号，a_setcookie.php即为：

再次通过浏览器依次访问：

http://www.b.com/b_setcookie.phphttp://www.a.com/a_getcookie.php

这次，你会发现在访问b.com域的时候，我们设置了a.com域的cookie值。

末了补充一句，似乎只有IE对跨域访问COOKIE限制比较严格，上述代码在FIREFOX下测试，即使不发送P3P头信息，也能成功。

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通过Fiddler可以方便的知道上面P3P代码的含义

P3P Header is present:CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"Compact Policy token is present. A trailing 'o' means opt-out, a trailing 'i' means opt-in.CURaInformation is used to complete the activity for which it was provided.ADMaInformation may be used for the technical support of the Web site and its computer system.DEVaInformation may be used to enhance, evaluate, or otherwise review the site, service, product, or market.PSAoInformation may be used to create or build a record of a particular individual or computer that is tied to a pseudonymous identifier, without tying identified data (such as name, address, phone number, or email address) to the record. This profile will be used to determine the habits, interests, or other characteristics of individuals for purpose of research, analysis and reporting, but it will not be used to attempt to identify specific individuals. PSDoInformation may be used to create or build a record of a particular individual or computer that is tied to a pseudonymous identifier, without tying identified data (such as name, address, phone number, or email address) to the record. This profile will be used to determine the habits, interests, or other characteristics of individuals to make a decision that directly affects that individual, but it will not be used to attempt to identify specific individuals.OURWe share information with ourselves and/or entities acting as our agents or entities for whom we are acting as an agent.BUSInfo is retained under a service provider's stated business practices. Sites MUST have a retention policy that establishes a destruction time table. The retention policy MUST be included in or linked from the site's human-readable privacy policy.UNINon-financial identifiers, excluding government-issued identifiers, issued for purposes of consistently identifying or recognizing the individual. These include identifiers issued by a Web site or service.PURInformation actively generated by the purchase of a product or service, including information about the method of payment.INTData actively generated from or reflecting explicit interactions with a service provider through its site -- such as queries to a search engine, or logs of account activity.DEMData about an individual's characteristics -- such as gender, age, and income.STAMechanisms for maintaining a stateful session with a user or automatically recognizing users who have visited a particular site or accessed particular content previously -- such as HTTP cookies.PREData about an individual's likes and dislikes -- such as favorite color or musical tastes.COMInformation about the computer system that the individual is using to access the network -- such as the IP number, domain name, browser type or operating system.NAVData passively generated by browsing the Web site -- such as which pages are visited, and how long users stay on each page.OTCOther types of data not captured by the above definitions.NOIWeb Site does not collected identified data.DSPThe privacy policy contains DISPUTES elements.CORErrors or wrongful actions arising in connection with the privacy policy will be remedied by the service.Validate at: http://www.w3.org/P3P/validator.htmlLearn more at: http://www.fiddlertool.com/redir/?id=p3pinfo

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