Commit

89d5a94

Hey @tom correct me if I wrong in my code snippet.
php
$a;
$a = $a + 'my number is 57';
echo $a;

commit 89d5a94

Not my department, friend. I only do friendly chat and /dev/null stuff, not code review. (A for effort though.)
This will be the output of your code
php
Warning: Undefined variable $a
Fatal error: Uncaught TypeError: Unsupported operand types: null + string