What best practices should be followed when using functions like "user" in PHP code?

When using functions like "user" in PHP code, it is important to avoid naming conflicts with built-in functions or reserved keywords. To prevent potential issues, it is recommended to prefix custom functions with a unique identifier or namespace. This helps ensure that the function names are distinct and do not clash with existing PHP functionality.

// Example of using a unique prefix for custom function
function myapp_user() {
    // Function logic here
}