Exercises
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To delete a variable, what function do you use:
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a) delete()
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b) unset()
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c) deset()
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d) remove()
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To uppercase the first letter in a string, what function do you use:
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a) str_to_upper()
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b) str_to_upper_first()
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c) uc_first()
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d) ucfirst()
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What does the dl() function do, and what is the major disadvantage to using it?
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Which of the following statements are true about recursive functions:
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a) They call themselves
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b) They need to be inside loops
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c) They need to be registered with PHP
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d) They must return a value
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Regular expressions should be used whenever possible : true or false?
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You always need to use addslashes() on variables before inserting them into a database: true or false?
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Using register_shutdown_function(), you can register as many shutdown functions as you want: true or false?
