As you gain experience with server-side scripting, you discoverincreasingly sophisticated ways to improve the user experience. Inthis Application, you explore the techniques of file storage andsession variables. To prepare for this Application: Saving to aFile An online order system is not very useful if it cannotremember the orders it accepts. Operating systems allow programs toread and write files so that they may store information. Websitesfrequently rely on more sophisticated database management systems,but that is beyond the scope of this course. The fundamentaloperations you use on a file are: •Open: Find or create the fileand make it available to the program
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