再介绍几个与类/对象相关的新函数

 




include "classes.inc"; 



// utility functions 



function print_vars($obj) { 

    $arr = get_object_vars($obj);//取类的变量！ 

    while (list($prop, $val) = each($arr)) 

        echo "t$prop = $valn"; 

} 



function print_methods($obj) { 

    $arr = get_class_methods(get_class($obj));//取类的方法！ 

    foreach ($arr as $method) 

        echo "tfunction $method()n"; 

} 



function class_parentage($obj, $class) { 

    global $$obj; 

    if (is_subclass_of($$obj, $class)) {//是否是子类 

        echo "Object $obj belongs to class ".get_class($$obj); 

        echo " a subclass of $classn"; 

    } else { 

        echo "Object $obj does not belong to a subclass of $classn"; 

    } 

} 



// 声明两个实例对象 



$veggie = new Vegetable(true,"blue"); 

$leafy = new Spinach(); 



// print out information about objects 

echo "veggie: CLASS ".get_class($veggie)."n"; 

echo "leafy: CLASS ".get_class($leafy); 

echo ", PARENT ".get_parent_class($leafy)."n"; 



// show veggie properties 

echo "nveggie: Propertiesn"; 

print_vars($veggie); 



// and leafy methods 

echo "nleafy: Methodsn"; 

print_methods($leafy); 



echo "nParentage:n"; 

class_parentage("leafy", "Spinach"); 

class_parentage("leafy", "Vegetable"); 

?>