Chapter 22. Debugging

Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible,
you are, by definition, not smart enough to debug it.
Brian W. Kernighan

No matter how good a programmer you are, you will at some point find that there are at least one or two errors in your codesometimes because you hit the wrong key while typing, other times because you misunderstood how a function worked, and sometimes even because you were coding at 5 a.m. It is important to understand the arsenal that PHP puts at your disposal.