11.1. Why are scripting languages popular for programming Web applications? Where in the three-tier architecture does a PHP program execute? Where does a JavaScript program execute?
11.2. What type of programming language is PHP?
11.3. Discuss the different ways of specifying strings in PHP.
11.4. Discuss the different types of arrays in PHP.
11.5. What are PHP auto-global variables? Give some examples of PHP auto-global arrays, and discuss how each is typically used.
11.6. What is PEAR? What is PEAR DB?
11.7. Discuss the main functions for accessing a database in PEAR DB, and how each is used.
11.8. Discuss the different ways for looping over a query result in PHP.
11.9. What are placeholders? How are they used in PHP database programming?
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