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8.18 Exercises

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What will the following function call return: is_readable("http://www.slashdot.org")
Which function locks files:
- a) lock()
- b) lockf()
- c) flock()
- d) file_lock()
What is the primary difference between rename() and move_uploaded_file()?
In the .ini file format, what is considered to be the start of a comment?
- a) //
- b) #
- c) ;
- d) All of the above
Which superglobal array contains information on uploaded files?
- a) $_GET
- b) $_POST
- c) $_REQUEST
- d) None of the above
Under what circumstances can the file_exists() function report incorrect data?

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