How can php accurately determine the extension of a remote file? The http response header is as follows: Array (& nbsp; [0] & nbsp; & gt; & nbsp; HTTP1.1 & nbsp; 200 & nbsp; OK & nbsp; [1] & nbsp; & gt; & nbsp; Content-Length: & nbsp; 345942 & How does nb php accurately determine the extension of remote files?
The http response header is as follows:
Array
(
[0] => HTTP/1.1 200 OK
[1] => Content-Length: 345942
[2] => Content-Type: application/octet-stream
[3] => Server: Microsoft-IIS/6.0
[4] => X-Powered-By: ASP. NET
[5] => Date: Sun, 08 Dec 2013 05:44:39 GMT
[6] => Connection: close
)
There is no extension in the file name, which is disorganized.
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------ Solution --------------------
The file name is only used to identify the data block stored in the media.
In network communication, the file name is meaningless.
Since Content-Type: application/octet-stream has been declared as a stream
The Length of Content-Length: 345942 is not too large. you can analyze it as an image first.
All data streams use specific identification marks. someone sent code here in the previous stage. you can find out.
