Which function allows you to delete a file?

Which function removes all HTML and PHP tags?

What's the output? $> php -r 'echo echo 'a';'

Which datatypes are treated as arrays in some cases?

What type of statements tell your PHP script to execute a section of code only if certain criteria are met?

Which line could you NOT use to comment out "Space: the final frontier"?

How might you troubleshoot a "call to undefined function" error?

The ignore_user_abort( ) function sets whether a client disconnect should abort a script execution. In what scenario would you, as a web developer, use this function?

PHP supports multiple types of loops. If you wanted to loop through a block of code if and as long a specified condition is true, which type of loop would you use?