PHP璁块棶鎺у埗
瀵瑰睘鎬ф垨鏂规硶鐨勮闂帶鍒讹紝鏄氳繃鍦ㄥ墠闈㈡坊鍔犲叧閿瓧 public銆乸rotected 鎴 private 鏉ュ疄鐜扮殑銆傜敱 public 鎵瀹氫箟鐨勭被鎴愬憳鍙互鍦ㄤ换浣曞湴鏂硅璁块棶锛涚敱 protected 鎵瀹氫箟鐨勭被鎴愬憳鍒欏彲浠ヨ鍏舵墍鍦ㄧ被鐨勫瓙绫诲拰鐖剁被璁块棶锛堝綋鐒讹紝璇ユ垚鍛樻墍鍦ㄧ殑绫讳篃鍙互璁块棶锛夛紱鑰岀敱 private 瀹氫箟鐨勭被鎴愬憳鍒欏彧鑳借鍏舵墍鍦ㄧ被璁块棶銆
瀵瑰睘鎬ф垨鏂规硶鐨勮闂帶鍒讹紝鏄氳繃鍦ㄥ墠闈㈡坊鍔犲叧閿瓧 public銆乸rotected 鎴 private 鏉ュ疄鐜扮殑銆傜敱 public 鎵瀹氫箟鐨勭被鎴愬憳鍙互鍦ㄤ换浣曞湴鏂硅璁块棶锛涚敱 protected 鎵瀹氫箟鐨勭被鎴愬憳鍒欏彲浠ヨ鍏舵墍鍦ㄧ被鐨勫瓙绫诲拰鐖剁被璁块棶锛堝綋鐒讹紝璇ユ垚鍛樻墍鍦ㄧ殑绫讳篃鍙互璁块棶锛夛紱鑰岀敱 private 瀹氫箟鐨勭被鎴愬憳鍒欏彧鑳借鍏舵墍鍦ㄧ被璁块棶銆
瀵圭被鎴愬憳鐨勮闂帶鍒
绫绘垚鍛橀兘蹇呴』浣跨敤鍏抽敭瀛梡ublic銆乸rotected 鎴 private 杩涜瀹氫箟
Example #1 澹版槑绫绘垚鍛
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<code><?php
/**
* Define MyClass
*/
class MyClass
{
public $public = 'Public';
protected $protected = 'Protected';
private $private = 'Private';
function printHello()
{
echo $this->public;
echo $this->protected;
echo $this->private;
}
}
$obj = new MyClass();
echo $obj->public; // 杩欒鑳借姝ｅ父鎵ц
echo $obj->protected; // 杩欒浼氫骇鐢熶竴涓嚧鍛介敊璇
echo $obj->private; // 杩欒涔熶細浜х敓涓涓嚧鍛介敊璇
$obj->printHello(); // 杈撳嚭 Public銆丳rotected 鍜 Private
/**
* Define MyClass2
*/
class MyClass2 extends MyClass
{
// 鍙互瀵 public 鍜 protected 杩涜閲嶅畾涔夛紝浣 private 鑰屼笉鑳
protected $protected = 'Protected2';
function printHello()
{
echo $this->public;
echo $this->protected;
echo $this->private;
}
}
$obj2 = new MyClass2();
echo $obj->public; // 杩欒鑳借姝ｅ父鎵ц
echo $obj2->private; // 鏈畾涔 private
echo $obj2->protected; // 杩欒浼氫骇鐢熶竴涓嚧鍛介敊璇
$obj2->printHello(); // 杈撳嚭 Public銆丳rotected2锛屼絾涓嶄細杈撳嚭 Private
class Bar
{
public function test() {
$this->testPrivate();
$this->testPublic();
}
public function testPublic() {
echo "Bar::testPublic ";
}
private function testPrivate() {
echo "Bar::testPrivate ";
}
}
class Foo extends Bar
{
public function testPublic() {
echo "Foo::testPublic ";
}
private function testPrivate() {
echo "Foo::testPrivate ";
}
}
$myFoo = new foo();
$myFoo->test(); // Bar::testPrivate
// Foo::testPublic
?></code>
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Note: 涓轰簡鍏煎鎬ц冭檻锛屽湪 PHP 4 涓娇鐢 var 鍏抽敭瀛楀鍙橀噺杩涜瀹氫箟鐨勬柟娉曞湪 PHP 5 涓粛鐒舵湁鏁堬紙鍙槸浣滀负 public 鍏抽敭瀛楃殑涓涓埆鍚嶏級銆傚湪 PHP 5.1.3 涔嬪墠鐨勭増鏈紝璇ヨ娉曚細浜х敓涓涓 E_STRICT 璀﹀憡銆
瀵规柟娉曠殑璁块棶鎺у埗
绫讳腑鐨勬柟娉曢兘蹇呴』浣跨敤鍏抽敭瀛梡ublic銆乸rotected 鎴 private 杩涜瀹氫箟銆傚鏋滄病鏈夎缃繖浜涘叧閿瓧锛屽垯璇ユ柟娉曚細琚缃垚榛樿鐨 public銆
Example #2 澹版槑绫讳腑鐨勬柟娉
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<code><?php
/**
* Define MyClass
*/
class MyClass
{
// 鏋勯犲嚱鏁板繀椤绘槸 public
public function __construct() { }
// 澹版槑涓涓 public 鐨勬柟娉
public function MyPublic() { }
// 澹版槑涓涓 protected 鐨勬柟娉
protected function MyProtected() { }
// 澹版槑涓涓 private 鐨勬柟娉
private function MyPrivate() { }
// 杩欎釜鏂规硶涔熸槸 public 鐨
function Foo()
{
$this->MyPublic();
$this->MyProtected();
$this->MyPrivate();
}
}
$myclass = new MyClass;
$myclass->MyPublic(); // 杩欒鑳借姝ｅ父鎵ц
$myclass->MyProtected(); // 杩欒浼氫骇鐢熶竴涓嚧鍛介敊璇
$myclass->MyPrivate(); // 杩欒浼氫骇鐢熶竴涓嚧鍛介敊璇
$myclass->Foo(); // Public銆丳rotected 鍜 Private 閮借璋冪敤浜
/**
* Define MyClass2
*/
class MyClass2 extends MyClass
{
// This is public
function Foo2()
{
$this->MyPublic();
$this->MyProtected();
$this->MyPrivate(); // 杩欒浼氫骇鐢熶竴涓嚧鍛介敊璇
}
}
$myclass2 = new MyClass2;
$myclass2->MyPublic(); // 杩欒鑳借姝ｅ父鎵ц
$myclass2->Foo2(); // Public 鍜 Protected 閮借璋冪敤浜嗭紝浣 Private 涓嶄細琚皟鐢
?></code>
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浠ヤ笂灏辨槸PHP璁块棶鎺у埗鐨勮缁嗗唴瀹癸紝鏇村淇℃伅璇峰叧娉∣D浜戝叾瀹冪浉鍏虫枃绔狅紒
鍠 娆 53