你为什么要在PHP中使用$ _GET？

Question

我还没有正式开始学习PHP,只是浏览几个教程,我有一个问题.为什么有人会选择使用Get vs Post？为什么你想要url栏中显示的数据？我知道post用于密码和重要信息,但我不明白为什么你会使用get而不是只是一直发布？

Thanks for any insight.

Answer 1

$_GET is useful for pages where users are requesting data - such as a search page, and pages that a user might want to bookmark and share with others. Actions that should be readonly.

$_POST is useful for pages where users are "posting" data - such as a signup form. $_POST should be used when you don't want your visitors to be able to bookmark page. Actions that write data.

As prodigitalson added: you may use $_POST or $_GET for any operation, but it is good practice to use them as described above.

Answer 2

If you want people to be able to share the link with their friends...for eg http://example.com/products.php?product_id=12

Answer 3

GET请求是幂等的.POST请求更改服务器状态.

这是一个HTTP问题,而不是PHP问题.