PHP Files  Locking a File Problem You want to have exclusive access to a file to prevent it from being changed while you read or update it. For example, if you are saving guestbook information in a file, two users should be able to ...

PHP Files Writing to Standard Output Problem You want to write to standard output. Solution Use echo or print():        print "Where did my pastrami sandwich go?";        echo "It went into my stomach."; Discussion Wh...