php - Deleting/Renaming a locked file -

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with php, there way force unlock file (for renaming/deleting) locked running program on same server?

more details: have image service running on server caches large pathology images web when try delete or rename images through php interface, cannot when image files locked , still being accessed web image service.

i have no control on web service cannot tell close image. work around restart web service , delete/rename files cause service interruption other users trying access other images through web.

os: windows server 2003


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