How can referencing official documentation, like php.net, help in understanding PHP functions like mkdir()?

Referencing official documentation like php.net can help in understanding PHP functions like mkdir() by providing detailed information about the function's parameters, return values, and usage examples. By reading the official documentation, developers can ensure they are using the function correctly and understand any potential errors or exceptions that may occur.

// Create a new directory named "example" with full permissions
mkdir("example", 0777);