PHP学习笔记之面向对象设计_PHP教程

class Test{
private $name='Janking',
$sex='male',
$age=23;

function __construct(){
$this->funcOne();
}

function func(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
}

private function funcOne(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
}
}


$P=new Test();
echo '

';
$P->func();
$P->age=100; // Cannot access private property Test::$age
$P->name="Rainy"; // Cannot access private property Test::$name
$P->sex="female"; // Cannot access private property Test::$female
$P->funcOne(); // Call to private method Test::funcOne() from context ''
?>

class Something {
// In OOP classes are usually named starting with a cap letter.
var $x;

function setX($v) {
// Methods start in lowercase then use lowercase to seprate
// words in the method name example getValueOfArea()
$this-＞x=$v;
}

function getX() {
return $this-＞x;
}
}

?＞

$obj = new Something;

$obj-＞setX(5);
$see = $obj-＞getX();

class Another extends Something {
var $y;
function setY($v) {
// Methods start in lowercase then use lowercase to seperate
// words in the method name example getValueOfArea()
$this-＞y=$v;
}

　function getY() {
return $this-＞y;
}
}

?＞

$obj2=new Another;
$obj2-＞setX(6);
$obj2-＞setY(7);

class Something {
var $x;

　function Something($y) {
$this-＞x=$y;
}

　function setX($v) {
$this-＞x=$v;
}

　function getX() {
return $this-＞x;
}
}

?＞

$obj=new Something(6);

function Something($x="3",$y="5")

$obj=new Something(); // x=3 and y=5
$obj=new Something(8); // x=8 and y=5
$obj=new Something(8,9); // x=8 and y=9

function Another() {
$this-＞y=5;
$this-＞Something(); //explicit call to base class constructor.
}

function niceDrawing($x) {
//Supose this is a method of the class Board.
$x-＞draw();
}

$obj=new Circle(3,187);
$obj2=new Rectangle(4,5);

$board-＞niceDrawing($obj); //will call the draw method of Circle.
$board-＞niceDrawing($obj2); //will call the draw method of Rectangle.