https://gist.github.com/some-daan/e4ccbe78e992b025956ba8b67ee224af#file-unset-php - the table at the very end is going to be:

```

Array

(

[0] => James

[1] => Dave

[3] => Lisa

)

```

iterating with `for` through such a table will end up with: "Warning: Undefined array key 2 ..."

using `unset` is dangerous :) ech.. php :D