if anyone can, would you please explain why the below code does what it does? I would expect $this->test in TestInstance to refer to the inherited $test from Test. Using php5RC3. Thanks.
<?php abstract class Test { private $test; abstract public function addToTest($i); }
class TestInstance extends Test { public function __construct() { $this->test = 0; }
public function addToTest($i) { $this->test += $i; } }
$t = new TestInstance(); $t->addToTest(3);
var_dump($t);
// test var SHOULD be private
echo "private test (shouldn't be able to access it directly, but i can): ".$t->test."\n\n";
/* output ------------------------------- object(TestInstance)#1 (2) { ["test:private"]=> NULL ["test"]=> int(3) } private test (shouldn't be able to access it directly, but i can): 3 */ ?>
The variable is private for Test, so TestInstance does not have access to it. By assigning 0 to $this->test in the constructor of TestInstance, you create a new property of TestInstance that is public (the default).
var_dump() shows it clearly:
object(TestInstance)#1 (2) {
["test:private"]=> NULL <---- belongs to Test
["test"]=> int(3) <---- belongs to TestInstance
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