How can Xdebug be integrated into XAMPP and Geany or Eclipse for step-by-step code execution and variable content display?

To integrate Xdebug into XAMPP and Geany or Eclipse for step-by-step code execution and variable content display, you will need to configure Xdebug settings in your php.ini file and set up the IDE to listen for Xdebug connections. Once configured, you can set breakpoints in your code and start a debugging session to step through the code and view variable values.

```php
// PHP code snippet to configure Xdebug in php.ini file

[xdebug]
zend_extension = "path/to/xdebug.so"
xdebug.remote_enable = 1
xdebug.remote_autostart = 1
xdebug.idekey = "ECLIPSE_DBGP" // or "netbeans-xdebug" for NetBeans
xdebug.remote_host = "localhost"
xdebug.remote_port = 9000
```

Remember to replace "path/to/xdebug.so" with the actual path to your Xdebug extension file.