self

在类内调用该类静态成员和静态方法的前缀修饰，对于非静态成员变量和函数则使用this。

<?php
class StaticExample {
    static public $arg1 = "Hello, This is static field.\n";
    static public function sayHello() {
        print self::$arg1;
    }
}

print StaticExample::$arg1;
StaticExample::sayHello();

结果：

Stephens-Air:Desktop$ php Test.php

Hello, This is static field.

Hello, This is static field.

转载于:https://www.cnblogs.com/dzy1997-com/p/7226268.html