what does the built in delete function do, I/O, Zend Certification

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Question:What does the built-in delete function do?

A It deletes a file 
B It deletes a directory 
C It unsets a variable 
D It removes a database row 
E This function does not exist!

/10

+ AnswerE

+ ExplanationAnswer E is correct. There is no function called delete() in PHP. Files are deleted with unlink(), while directories are deleted with rmdir(). Database rows are deleted using the DELETE SQL statement (not a PHP function) and, finally, variables are unset using unset().

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