Question

I have small HTTP server script that receives HTTP client requests and replies. I need to detect when there is \r\n\r\n type of ending. This happens when we have an input like this:

GET / HTTP/1.1
Host: test.com
Connection: close

I need to stop reading after the “Connection: close” double return hit. I tried with strpos and other string functions, but it is not working. Any hints to detect this kind of string ending in PHP?

Thanks.

Answer 1

For that specific protocol you can just look for empty lines with:

 if (!strlen(trim($line))) {

Actually you should be looking for \r\n (and \n for buggy clients), but other combinations are unlikely to occur. So anything with just whitespace is not a valid header line anymore.