PHP 关于访问控制的和运算符优先级介绍_PHP教程

class Foo
{
private $name = 'hdj';
public function getName(){
return $this->name;
}
}

class Bar extends Foo
{
public $name = 'deeka';
}

$bar = new Bar;
var_dump($bar->name);
var_dump($bar->getName());

访问控制

对属性或方法的访问控制，是通过在前面添加关键字 public、protected 或 private 来实现的。由 public 所定义的类成员可以在任何地方被访问；由 protected 所定义的类成员则可以被其所在类的子类和父类访问（当然，该成员所在的类也可以访问）；而由 private 定义的类成员则只能被其所在类访问。

$a = 3;
$b = 6;
if($a = 5 || $b = 7){
echo $b.'
';
$a++;
$b++;
}
var_dump($a, $b);
echo '
$a = (5 || $b = 7)';

echo '

---

';
$a = 3;
$b = 6;
$c = 1;
if($a = 5 || $b = 7 && $c = 10){
$a++;
$b++;
}
var_dump($a, $b,$c);
echo '
&& 比 || 高';

echo '

---

';
$a = 3;
$b = 6;
$c = 1;
if($a = 0 || $b = 7 && $c = 10){
$a++;
$b++;
}
var_dump($a, $b,$c);
echo '
';
echo '

---

';

class Foo {
private $name = 'hdj';
public function getName() {
return $this->name;
}
}

class Bar extends Foo {
public $name = 'deeka';
}

$bar = new Bar;
var_dump($bar->name);
var_dump($bar->getName());

http://www.bkjia.com/PHPjc/328057.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/328057.htmlTechArticle复制代码 代码如下: class Foo { private $name = 'hdj'; public function getName(){ return $this-name; } } class Bar extends Foo { public $name = 'deeka'; } $bar = new Bar; va...