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<?php
class employee
{
protected $sal = 3000;
public function getSal() {
$this->sal = $this->sal + 1200;
return $this->sal ;
}
}
class Manager extends employee
{
//Èç¹ûÏëÈþÀíÔÚÔ±¹¤¹¤×ʵĻù´¡É϶෢1500Ôª
//±ØÐëÏȵ÷Óø¸ÀàµÄgetSal()·½·¨
public function getSal() {
parent::getSal(); // ÕâÀïµ÷ÓÃÁ˸¸ÀàµÄ·½·¨
$this->sal = $this->sal + 1500;
return $this->sal ;
}
}
$emp = new employee();
echo "ÆÕͨԱ¹¤µÄ¹¤×ÊÊÇ " . $emp->getSal();
echo "<br />";
$manager = new Manager();
echo "¾ÀíµÄ¹¤×ÊÊÇ: " . $manager->getSal();
?>
¸¸ÀàµÄprivateÊôÐÔ
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<?
class employee
{
private $sal = 3000;
//protected $sal = 3000;
public function getSal() {
return $this->sal;
}
}
class Manager extends employee
{
protected $sal = 5000;
public function getParentSal() {
//ÕâÀï·µ»ØµÄÊǸ¸ÀàµÄprivateÊôÐÔ
return parent::getSal();
}
}
$manager = new Manager();
echo "PHP " . phpversion() . "<br />";
echo $manager->getSal();
echo "<br />";
echo "parent's \$sal " . $manager->getParentSal();
?>
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