Detecting Encoding from POST Request in PHP

'Basic Rules of Receiving Non-ASCII Characters from Input Forms' tutorial was cited in a csdn.net article in 2019.

The Basic Rules of Receiving Non-ASCII Characters from Input Forms tutorial was cited in a csdn.net article in 2019.

Subject: PHP如何确定浏览器POST请求数据中的字符编码?
Date: Dec 2, 2019
Author: dongqing904999
Source: https://ask.csdn.net/questions/990036

...
In regard to GET data, the W3C standard states

Note. The "get" method restricts form data set values to ASCII characters.
Only the "post" method (with enctype="multipart/form-data") is specified
to cover the entire [ISO10646] character set.

So with GET the browser seems to be locked into ASCII, if the form element
has the attribute enctype="multipart/form-data" it seems the standard
supports the larger charset [ISO10646].

And I guess because it is closer to a pure bitstream, the default
Content-type of application/x-www-form-url-encoded supports all character
encodings. in particular this article states:
http://www.herongyang.com/PHP/Non-ASCII-Form-Basic-Rules.html

...

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Detecting Encoding from POST Request in PHP

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