fpoen() has to be close mandatorly to free resources?

anoopmail

i'm using fopen() to check whether an image exists on a remote cdn server in almost all pages. I 'm not sure these resource handles will remain on the remote server if I didnt not close explicitly. Any ideas? nd if yes , how long it may remain there?

bradgrafelman

The resources should be closed automatically after your script has terminated.

Any reason you aren't using [man]file_exists/man or perhaps even [man]cURL[/man] instead of [man]fopen/man, though?

anoopmail

hm..i'm still not clear that the resource handle would create in the local server in which the script runs or in the remote server. which memory will be utilized?

mykg4orce

i would agree with the previous response. fopen is meant to open a file which implies that you will at some point fclose($handle) that file.

fopen will lock that file, any script that tries to open it will fail.

So don't create a situation where there is a possibility of fopen being called on the same file at the same time.

bradgrafelman

mykg4orce wrote:
fopen is meant to open a file which implies that you will at some point fclose($handle) that file.

You don't have to, though - PHP's garbage collection process will close the open handle (which doesn't necessarily point to a file, by the way :p) after the script has finished executiong.

mykg4orce wrote:
fopen will lock that file, any script that tries to open it will fail.

No, it won't; that's the job of [man]flock/man. EDIT: Also note that just because you open a file for reading or writing doesn't mean that you must lock it (meaning multiple programs can be accessing the file at once if you don't lock it).

anoopmail wrote:
i'm still not clear that the resource handle would create in the local server in which the script runs or in the remote server. which memory will be utilized?

I'm not sure I understand your question... Are you asking if fopen() will open a file resource handle on a remote server? If so, you might want to stop and think about that - why would you be able to manipulate resource handles on a remote server?