class MyClass { public function __construct() { echo "Object ID: " . self::getId() . "\n"; } public static function getId() { return uniqid(); } } $obj1 = new MyClass(); // Outputs: Object ID: 5ed614a6a2c6d $obj2 = new MyClass(); // Outputs: Object ID: 5ed614a6a2ceaIn this example, we have a class called MyClass with a constructor that outputs the object ID using self getId method. The getId method generates a unique ID using the uniqid function. When we create two instances of the MyClass class, we get two different object IDs. Package/Library Determination: Since self getId is not a built-in PHP function, it is likely that it is implemented within the MyClass class or some other custom library or framework. It is not possible to determine the package or library that contains this method without additional context or information.