It’s 1:00 a.m., the deadline for your web application’s delivery is in 8 hours… and it’s not working. As you try to figure out what’s going on, you fill your code with var_dump() and die() everywhere to see where the bug is… You are annoyed. Every time you want to try out a return value or variable assignment, you have to change your source code, execute your application, and see the results… In t