<?php class Foo { //静态成员,可以不用实例化类而直接访问。 public static $my_static = 'foo'; public function staticValue() { return self::$my_static; } } print Foo::$my_static; //输出'foo'; $foo = new Foo(); print $foo->staticValue() . " "; //‘foo’ //静态方法 class Bar { public static function aStaticMethod() { echo "outo"; } } Bar::aStaticMethod(); //输出'outo' ?>