PHP学习笔记--有关php中的变量_PHP教程

PHP中的可变变量(更多请自行参考php手册):

　　php中的可变变量说白了，就是拿一个变量的值解析成一个变量名，去读那个变量名的值。实例：

　　

 = "China";  
     = "a";       
     = "I'm Chinese !"; 
     = "b";  
    
     ."
";  
     $."
"; 
     = "f";  
     $."
"; 
     = "b"; 
     $."

"; 
    
     ."
"; 
     $."
"; 
     $$."

"; 
    
     ."
"; 
     $."
"; 
     $$."
"; 
     $$$."

"; 
 = "China"; 
     ."
"; 
     $; 
?>

注意：可变变量不能应用于$this和超全局变量 (php变量的作用域和其他高级编程语言有所不同。看代码)

 = 'man' = 'abc'; 
    $$ = 'def' ."
"; 
     ; 
    
     "
" ; 
         ."
";  
";
         ['name']; 
?>

变量函数:

 "这是B" c( = "China") 
 "这是" = 'b'(); 
          = 'c' ?>

可变变量的一个典型应用:

span PUBLIC