How to use Xdebug for debugging PHP errors?

Xdebug is a powerful PHP extension for debugging. Install and configure Xdebug in your php.ini. Then you can set breakpoints in your code using an IDE like VS Code with Xdebug extension. When the execution reaches the breakpoint, Xdebug pauses the script and allows you to inspect variables, step through the code, and identify the source of the error.