Detect with php if files is being uploaded, or is open

I have a PHP script that opens a local directory in order to copy and process some files. But these files may be incomplete, because they are being uploaded by a slow FTP process, and I do not want to copy or process any files which have not been completely uploaded yet.

Is is possible in PHP to find out if a fi开发者_C百科le is still being copied (that is, read from), or written to?

I need my script to process only those files that have been completely uploaded.

The ftp process now, upload files in parallel, and it take more than 1 second for each filesize to change, so this trick is not working for me now, any other method suggests

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Do you have script control over the FTP process? If so, have the script that's doing the uploading upload a [FILENAME].complete file (blank text file) after the primary upload completes, so the processing script knows that the file is complete if there's a matching *.complete file there also.

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+1 to @MidnightLightning for his excellent suggestion. If you don't have control over the process you have a couple of options:

If you know what the final size of the file should be then use filesize() to compare the current size to the known size. Keep checking until they match.

If you don't know what the final size should be it gets a little trickier. You could use filesize() to check the size of the file, wait a second or two and check it again. If the size hasn't changed then the upload should be complete. The problem with the second method is if your file upload stalls for whatever reason it could give you a false positive. So the time to wait is key.

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You don't specify what kind of OS you're on, but if it's a Unix-type box, you should have fuser and/or lsof available. fuser will report on who's using a particular file, and lsof will list all open files (including sockets, fifos, .so's, etc...). Either of those could most likely be used to monitor your directory.

On the windows end, there's a few free tools from Sysinternals that do the same thing. handle might do the trick