How to save the wav binary stream from post on other pages-php Tutorial

How can I save the rt of the wav binary stream from post on other pages, I learned php for only one week and was used to build a project. it is miserable. TT ------ solution ------------------ this is irrelevant to the java processing method. if the multipartform-data header information is sent during data transmission, then php will separate it and process it as an uploaded file. Instead of providing it as a stream. how can I save the wav binary stream from post on other pages?
Rt, please kindly advise, just a week of learning php is used for project miserable T

------ Solution --------------------
This is irrelevant to the java processing method.
If the multipart/form-data header information is sent during data transmission, php will separate it and process it as an uploaded file. Instead of providing it to users as a stream