What are the differences between calling a static method using the class name, object instance, and object operator in PHP?

When calling a static method in PHP, you can use either the class name, object instance, or object operator. Using the class name is the most common and recommended way to call a static method, as it clearly indicates that the method is static. Calling a static method using an object instance or object operator is technically possible but not recommended, as it can lead to confusion and is not considered best practice.

// Using the class name to call a static method
ClassName::staticMethod();

// Using an object instance to call a static method (not recommended)
$obj = new ClassName();
$obj->staticMethod();

// Using the object operator to call a static method (not recommended)
$obj = new ClassName();
$obj::staticMethod();