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参考: http://www.cnblogs.com/devcjq/articles/2424738.html http://www.cnblogs.com/alsf/p/9621002.html https://blog.csdn.net/xf552527/article/details/81325815 1.PHP之parent解析 parent是指向父类的指针,一般用于调用父类的构造函数来初始化子类,如parent::__construct() 2.PHP之$this解析 $this是指向当前对象(即类的实例化对象)的指针
3.PHP之self解析 self是指向当前类的指针,而非实例化后的对象指针
4.PHP之static解析 static是指向当前调用类的指针
<?php class Boo { protected static $str = "This is class Boo"; public static function get_info(){ echo get_called_class()."\n"; echo self::$str; } public static function get_msg(){ echo get_class()."\n"; echo static::$str; } } class Foo extends Boo{ protected static $str = "This is class Foo"; } Foo::get_info(); echo "\n"; Foo::get_msg(); ?> //输出结果 Foo This is class Boo Boo This is class Foo
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