[php-src] Issue #7750: string '0.0' evaluated to true

Issue: https://github.com/php/php-src/issues/7750 Author: richirm77 ### Description Surely this is not a mistake, but I do not understand why it is so. Consider the following code: ```php if (0) echo "int 0 is true" . "\n"; if ('0') echo "string '0' is true" . "\n"; if (0.0) echo "float 0.0 is true" . "\n"; if ('0.0') echo "string '0.0' is true" . "\n"; ``` Why does the string '0.0' evaluate to true, when its logical value would be false? The string '0' evaluates to false. Why is the same not true for '0.0'? https://3v4l.org/ZNhbM ### PHP Version PHP 7.X, 8.X ### Operating System _No response_