Great Mirror Code -- Not question, just sharing

**Twey** · 04-17-2006, 10:59 AM

...this will reach 11. It's just a count.

Yes, you're right. I apologize, I was confusing $n with $check.

btw, I've used the file commands before, so I'm assuming that allow_url_fopen is working... so.... yeah.

But you decided to post it for others to use. You should always assume they have the minimal requirements when making a script public; that means no short tags, and no relying on config options that aren't always on by default.

I'm kinda lost in the last paragraph. From what I've seen, md5 doesn't just do those characters, but all letters, plus caps. I might be imagining this, though, in which case, yeah, you're right...

You are. md5() returns a hexadecimal string, meaning it contains only digits from 0 to F.

Your code didn't really make sense to me 'cause a lot of it was complex commands I'm unfamiliar with...

What "complex commands?" The only thing you could possibly have had trouble with was fsockopen(). The rest is just simple looping and string manipulation.

Also... the only reason mine is too complex is that it does the loop to move to the next one if it's an error..... I don't really need that. Heh.

So if one of your mirrors is down, all the people who would normally be sent to that mirror can't download your file?

**djr33** · 04-17-2006, 08:04 PM

Yes, you're right. I apologize, I was confusing $n with $check.

Yeah, no problem. I added that afterwords when I realized it wouldn't get there

But you decided to post it for others to use. You should always assume they have the minimal requirements when making a script public; that means no short tags, and no relying on config options that aren't always on by default.

Good point. I'm using this for my own stuff and sharing it as a "cool idea" more than a script to just use, but you're right to point that out... I was thinking of it for me, not for those without that command.

You are. md5() returns a hexadecimal string, meaning it contains only digits from 0 to F.

Ah, ok. Hmm... true, then.

Your code-- I don't know much about ports, fsockopen, and things like that. It's not the syntax as much as the stuff behind it. This is all fairly new to me... trying to catch up.

So if one of your mirrors is down, all the people who would normally be sent to that mirror can't download your file?

Yeah... they would get a dead mirror.... so... it's true, I should code that in there. I just think I'd know which servers were up, at least in the case I'm gonna be using this code for now. But... that's a useful thing if you aren't keeping an eye on the servers.
Also, an easy alt is just to have it check, then, if it doesn't work, just revert back to a mirror that will definitely be up (maybe the host that the page itself is on). But... probly worth coding the rest.

**Twey** · 04-17-2006, 09:02 PM

I don't know much about ports, fsockopen, and things like that.

Google for a TCP/IP tutorial.

**djr33** · 04-17-2006, 11:04 PM

I'm not just talking about PHP with them, but the stuff in general. Anything specific I should look for? I mean, a php tut will just tell me what to type, not why.

**Twey** · 04-18-2006, 09:24 AM

Nor was I

http://compnetworking.about.com/od/tcpip/l/blfaq012.htm

There are several ports that are usually used for certain services: 80 for HTTP, 21 for FTP, 23 for telnet, 22 for SSH...
These aren't binding; it's only a convention. Thus we get URLs like http://www.example.com:8080/index.php telling the browser to connect to port 8080, not the default 80. A fairly comprehensive list of these services, with explanations, can be found in any *n?x computer's /etc/services file.