What are the potential pitfalls of naming variables in PHP code?

One potential pitfall of naming variables in PHP code is using reserved keywords or names that are already in use by PHP functions or classes. This can lead to conflicts and unexpected behavior in your code. To avoid this issue, it is best practice to choose variable names that are descriptive, unique, and not already in use within the PHP language.

// Bad example - using a reserved keyword as a variable name
$echo = "Hello World";

// Good example - using a unique and descriptive variable name
$message = "Hello World";