PHP中的抽象类可以有默认方法吗？

Question

I've most certainly got something very basic wrong here.

Here is the code that is part of my Abstract Class:

private $outarray = null;

public function add_to_array($ahref, $docname, $description) {
  $row = array('ahref' => $ahref, 'docname' => $docname, 'description' => $description);
  if (!isset($this->outarray)) {
    $this->outarray = array();
  }
  array_push($this->outArray, $row);
}

When I step through the code, though, the outArray remains null. It is never created and never populated.

I'm still green with PHP, but this help doc seems to leave me believing that this is OK to do:

http://www.php.net/manual/en/language.oop5.abstract.php

...particularly where they are declaring the Common method printOut() that performs some action.

I've got 5 elements I am trying to populate outArray with, but each of the 5 times I circle into this function, I come out with outArray being NULL.

Answer 1

Variables are case sensitive. You have in one place $this->outarray and in array_push you have $this->outArray