Why Doesn't POST Support `enctype='text/plain'` While GET Does?

Incompatibility of method="post" and enctype="text/plain"

When attempting to use the following form:

<form method="post" enctype="text/plain" action="proc.php">

you may encounter difficulties in successfully transmitting form data to the "proc.php" file. What causes this problem, and why is it impossible to utilize "text/plain" encoding with the "post" method while it is possible with the "get" method?

Explanation:

PHP's inability to handle "text/plain" encoding with the "post" method is the root of this issue (and it's not a bug):

https://bugs.php.net/bug.php?id=33741

For the "enctype" attribute in the "

" tag, the following valid values are:

• application/x-www-form-urlencoded
• multipart/form-data

The first value is the default, and the second is only required for file uploads.

Reason for PHP's behavior:

Alohci provided an explanation for why PHP does not populate the $_POST array and instead stores the value in the $HTTP_RAW_POST_DATA variable:

Distinction between GET and POST:

• GET: Variables are included in the URL as query strings and must be URL-encoded. Even with "enctype=text/plain," browsers URL-encode variables.
• POST: Variables are not part of the URL but are sent as the last header in HTTP requests (POSTDATA). You can specify whether to send them as "text/plain" or "application/x-www-form-urlencoded," but the latter is the only option that eliminates ambiguity.

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