php中的static：
1：属于静态变量:；
2：是全部类的属性；
3：调用静态变量要用：：（两个冒号）。
eg：1
1 <html> 2 <head> 3 <title>static测试</title> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/> 5 </head> 6 <body> 7 <?PHP 8 class Person{ 9 10 static $type = "人物"; 11 public $name = "张三"; 12 public $age = 18; 13 14 public function intro(){ 15 echo Person::$type."<br/>".$this->name."<br/>".$this->age."<br/>"; 16 } 17 } 18 19 $p1 = new Person(); 20 21 $p1->intro(); 22 ?> 23 </body> 24 </html>
eg：2
1 <html> 2 <head> 3 <title>static测试</title> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/> 5 </head> 6 <body> 7 <?PHP 8 class Person{ 9 10 static $type = "人物"; 11 public $name = "张三"; 12 public $age = 18; 13 14 public function intro(){ 15 echo Person::$type."<br/>".$this->name."<br/>".$this->age."<br/>"; 16 } 17 } 18 19 $p1 = new Person(); 20 Person::$type = "张三不是人！"; 21 22 $p1->intro(); 23 ?> 24 </body> 25 </html>
eg：3
class类的继承
1 <html> 2 <head> 3 <title>class类的继承</title> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/> 5 </head> 6 <body> 7 <?PHP 8 class Person{ 9 10 static $type = "人物"; 11 public $name = "张三"; 12 public $age = 18; 13 14 public function intro_Person(){ 15 echo $this->name."<br/>".$this->age."<br/>"; 16 } 17 } 18 19 class Teacher extends Person{ 20 21 public function intro_Teacher(){ 22 echo $this->age; 23 } 24 25 } 26 27 class Students extends Teacher{ 28 29 public function intro_Students(){ 30 echo $this->age; 31 } 32 33 } 34 35 $p1 = new Students(); 36 37 $p1->intro_Students(); 38 ?> 39 </body> 40 </html>