Hey...my first semester came to an end on 16Dec09. Today that is on 18 Dec I had an interview for a RA position...they gave me a research paper to study :) this exam was the best I ever had even I didn't performed very well :) ;) but still...I have also applied in facebook they might give me a call.
If you want to know that the argument supplied is a file or not use is_file() file_exists() will take both file and directory as input and return true if they exists. So, unless you specifically want to check if the argument passed is a file use is_file otherwise use file_exists()
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