Example explanation of $_POST in php

$_POST: Array of variables passed via the HTTP POST method. is an automatic global variable.

$GLOBALS['HTTP_RAW_POST_DATA']: Always generate variables containing raw POST data. This variable is only generated when data of an unrecognized MIME type is encountered. $HTTP_RAW_POST_DATA For enctype="multipart/form-data" form data is not available.

That is to say, basically $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST are the same.

But if the posted data is not recognized by PHP, you can use $GLOBALS['HTTP_RAW_POST_DATA'] to receive it, such as text/xml or soap, etc.

• Additional explanation: The data type recognized by PHP by default is the application/x-www.form-urlencoded standard data type.

• This is what the manual says
  
  Always generate variables containing the original POST data. Otherwise, this variable is only generated when data of an unrecognized MIME type is encountered. However, a better way to access the raw POST data is php://input. $HTTP_RAW_POST_DATA for enctype="multipart/form-data" Form data is not available.
  
  Problem: $HTTP_RAW_POST_DATA == $_POST ?
  
  According to the manual, the answer should be no.
  If they are different, what is their difference?

• ##I know the answer, as follows:
  
  The RAW/uninterpreted HTTP POST information can be accessed with:
  $GLOBALS['HTTP_RAW_POST_DATA']
  This is useful in cases where the post Content-Type is not something PHP understands (such as text/xml).
  
  That is, basically $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST is the same. But if the data posted is not recognized by PHP, you can use $GLOBALS['HTTP_RAW_POST_DATA'] to receive, such as text/xml or soap etc.
  
  The data type recognized by PHP by default is the application/x-www.form-urlencoded standard data type
  
  Use Content-Type=text/xml Type, submit an xml document content to the php server, how to obtain this POST data.
  
  The RAW / uninterpreted HTTP POST information can be accessed with: $GLOBALS['HTTP_RAW_POST_DATA'] This is useful in cases where the post Content-Type is not something PHP understands (such as text/xml).
  
  Since PHP only recognizes application/x-www.form-urlencoded standard data types by default, it cannot handle content such as text/xml. It is parsed into a $_POST array, so the prototype is retained and passed to $GLOBALS['HTTP_RAW_POST_DATA'] to receive.
  
  There is another item php://input This function can also be implemented
  
  php://input allows reading the raw data of POST. and It puts less pressure on memory than $HTTP_RAW_POST_DATA and doesn't require any special php.ini set up. php://input cannot be used with enctype="multipart/form-data".
  
  application

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