What best practices should be followed when including files in PHP classes?

When including files in PHP classes, it is best practice to use the `require_once` or `include_once` functions to avoid including the same file multiple times and causing conflicts. This ensures that the file is included only once, preventing any redeclaration errors. Additionally, it is recommended to use absolute paths or the `__DIR__` constant to specify the file path, ensuring that the file is included correctly regardless of the current working directory. 

class MyClass {
    public function includeFile() {
        require_once __DIR__ . '/path/to/file.php';
    }
}

Keywords

autoloading namespaces require_once include_once PSR-4

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