When should static context, instance context, and local context be considered in PHP programming?

When writing PHP code, it is important to understand the differences between static context, instance context, and local context. Static context refers to variables or methods that are shared across all instances of a class, instance context refers to variables or methods that are unique to each instance of a class, and local context refers to variables or methods that are only accessible within a specific function or block of code. It is important to consider these contexts when designing classes and methods to ensure proper functionality and data encapsulation.

class MyClass {
    public static $staticVar = 0; // static context

    public $instanceVar; // instance context

    public function myFunction() {
        $localVar = "Hello, World!"; // local context

        echo self::$staticVar; // accessing static context
        echo $this->instanceVar; // accessing instance context
        echo $localVar; // accessing local context
    }
}