• Examples
  • Objective interface

  • Objective interface
  • Objective interface

    Objective interface

    The objective interface provides an
    object-oriented way to access the extended interfaces. The
    following example shows how the above one would be implemented
    using the objective interface. The output of this example is
    exactly the same, except that instead of printing “Not a valid
    counter!”, this will instead issue a PHP warning that the variable
    $counter_three is not an object. This example shows that
    it is possible to subclass the Counter class defined by the extension, as
    well as that the counter’s value is maintained using an instance
    variable rather than method access.

    Example #1 “counter”‘s objective interface

    class MyCounter extends Counter
        public function 
    printCounterInfo() {
    printf("Counter's name is '%s' and is%s persistent. Its current value is %d.\n",
    $this->getMeta(COUNTER_META_IS_PERSISTENT) ? '' ' not',

    if ((
    $counter_one Counter::getNamed("one")) === NULL) {
    $counter_one = new Counter("one"0COUNTER_FLAG_PERSIST);
    $counter_one->bumpValue(2); // we aren't allowed to "set" the value directly
    $counter_two = new Counter("two"5);
    $counter_three Counter::getNamed("three");