Which superglobal variable holds information about headers, paths, and script locations?

DRY (Don't Repeat Yourself) is a principle of software development aimed at reducing repetition of software patterns. Which choice is not a way to write DRYer code with PHP?

Which code will return the IP address of the client?

Your site must allow uploading of large files. What might you need to do?

What are some of the main types of errors in PHP?

Which two functions can sanitize text and validate text formats?

In this example code, $result = print_r ($a); $result is the

Which statement will NOT combine strings $s1 and $s2 into a single string?

Difference between the use of single quotes and double quotes in PHP syntax?

Which one checks to see if HTTP headers have been sent?

To access functions of an instantiated class, you use the following: