ftp - In PhpStorm, what do I need a "HTTP connection" for? -

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i want create project remote files via ftp connection. in "add remote server" dialog, set ftp connection. "test connection" told me it's valid, , can choose root directory, ftp working.

however, right under it, there "web server root url" input , "don't check http connection server" checkbox. need these for? what's point of http connection, when using ftp? documentation doesn't explain in no sense.

i had check latter box, otherwise couldn't continue import/synchronizing: says "connection failed: connection refused", although ftp connection stable. made me think needed ftp and http.

for visualisation purposes:

enter image description here


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