How can the naming conventions of variables in PHP scripts impact the compatibility and functionality of the code, especially when transitioning between different PHP versions?

Variable naming conventions in PHP scripts can impact compatibility and functionality when transitioning between different PHP versions. It is important to follow best practices for variable naming to ensure code readability and maintainability. Using meaningful and descriptive names, avoiding reserved keywords, and adhering to naming conventions like camelCase or snake_case can help prevent conflicts and errors when moving code between different PHP versions.

// Example of using camelCase naming convention for variables
$myVariableName = "value";
$anotherVariable = 123;