Hi there,
I'm going to create a small chat script with PHP. The messages you want others 
to see will be added to a flat file (I.E. TXT file), and read and displayed by 
PHP. However, I want this reading and displaying to be periodic. This means 
that I want PHP to check the file for new lines every,say, fifteen seconds. How 
may I do that? I have been unable to find any function that acts like a timer.
Thanks!
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