Is there such a thing as a URL_Exists function?

[usafrmajor]

I would like to see if a file exists on a different web domain hosted by a different company and was wondering if there was a function like file_exists() that does this when the file is located on the same web domain server.

 

thanks

 

Alan

[JonnoTheDev]

I would use the HTTP status header to see if the file is valid. If a 200 response is returned then the file is definatly there. Use fsockopen() to do this. Example:

<?php
// obtain http header for a given url filepath
function file_exists_from_http_header($server, $filepath) {
$fp = fsockopen($server,80,$errno,$errstr,30);
$out  = "GET /".$filepath." HTTP/1.1\r\n"; 
$out .= "Host: $server\r\n"; 
$out .= "Connection: Close\r\n\r\n";
fwrite($fp,$out);
$content = fgets($fp);
if(strstr($content, "200 OK")) {
	// file exists
	return true;
}
return false;
}

// usage
if(file_exists_from_http_header("www.google.co.uk", "intl/en_uk/images/logo.gif")) {
print "file exists";
}
else {
print "file does not exist";
}	
?>

[usafrmajor]

Can't seem to get this to work.  I just cut and pasted your code for the function and have verified that the domain name is correct and the file does exist in the directory I enter as the second parameter.

 

Any thoughts on what I could be doing wrong?

 

thanks

 

Alan

[trq]

Not in html theres not.

[JonnoTheDev]

Can't seem to get this to work.  I just cut and pasted your code for the function and have verified that the domain name is correct and the file does exist in the directory I enter as the second parameter.

 

Have you saved as a php file i.e test.php

http://www.yourdomain.com/test.php

 

and yes, you should have posted this in PHP help not HTML

[usafrmajor]

What other kind of file would I save it to?

 

And, considering this site is for all kinds of help associated with PHP I was looking for the forum that I thought most closely applied to my problem.

 

thanks

[Mardoxx]

yes there is

 

do what neil.johnson but using javascript

[JonnoTheDev]

what is the error

[haku]

Did you try it with google as was in the original code?