Comments on: PHP- Check If File Exists On Different Domain

By: Ian.J.Gough

Ian.J.Gough — Fri, 15 Jul 2011 12:22:25 +0000

Thats a lot quicker way to do it.
Many Thanks,
Ian

By: IdontKnow

IdontKnow — Fri, 04 Mar 2011 23:09:00 +0000

http://curl.haxx.se/download.html
Place curl.exe in apache/bin/, enable php curl extension in php.ini and I think php must be registered as a apache module otherwise curl.exe must be placed in windows/system32/.

function rfile_exists($address)
{
$ch = curl_init();

curl_setopt($ch,CURLOPT_URL,$address);
curl_setopt($ch,CURLOPT_NOBODY,1);
curl_setopt($ch,CURLOPT_FAILONERROR,1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

if(curl_exec($ch) !== FALSE)
{
return true;
}

return false;

curl_close($ch);
}

By: Igor PortalPressDOTorg

Igor PortalPressDOTorg — Mon, 24 Jan 2011 19:44:38 +0000

Another example :

It took 0.338297 seconds to check http_get_headers [!]

It took 0.006532 seconds to check http_fsockopen on the same file.

I’ve done this test over and over again, as I want the best performance. There are examples on the internet, how to make this function; they are, however, never as good as mine; but mine is commercial, so I can’t give that away. Just keep in mind one tip : Never use preg_match!

Regards, Igor

By: Igor PortalPressDOTorg

Igor PortalPressDOTorg — Mon, 24 Jan 2011 19:30:41 +0000

@Steve file_get_contents on a remote file is unreliable; after a while it might give errors. Just check the internet on what I assume. Besides that, Paul is right; why read a whole file? Your solution is not good and surely not the best. Pauls is a far better one.

However, I’ve written a much larger function with fsockopen then Pauls, but the performance is also much better:

It took 0.003989 seconds to check http_get_headers, using Pauls function.
bool(true)=the result

It took 0.002345 seconds to check http_fsockopen, using my function.
bool(true)=the result

Just a tip.

Regards, Igor

By: Maruf

Maruf — Mon, 28 Jun 2010 13:53:24 +0000

Hey Paul,

Many thanks, that’s a great solution! I will update this post later

Learn something new every day…