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

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

Which operator would you use to find the remainder after division?

Assuming the Horse class exists, which is a valid example of inheritance in PHP?

Both triple === and double == can be used to ** variables in php. If you want to hear that string "33" and the number 33 are equal, you would use ** . If you want to check if an array contains a particular string value at a particular index, you would use _

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

Which function removes all HTML and PHP tags?

Which function allows you to delete a file?

What's the output? $str = 'My name is O\'Connor.'; echo stripslashes($str);

Arrays in PHP can only hold the same data type.