[php-src] Issue #7895: Uncaught TypeError: Unsupported operand types: string * string in

Issue: https://github.com/php/php-src/issues/7895 Comment Author: iluuu1994 @tolgahanacar > <8 PHP Mathematical operations can be done with string expressions. Yes, before PHP 8 all non-numeric strings in arithmetic operations could get cast to 0. This could lead to detrimental bugs, especially when dealing with currencies like you are. If you look at my comment [here](https://github.com/php/php-src/issues/7895#issuecomment-1006565805), you can use filter_var to convert the value to a number. If the value turns out not to be a number it's converted to false, in which case you can decide what to do yourself (abort, use a default number, whatever is appropriate).