外部函数调用后获取对象

Question

在不使用静态类的情况下，如何在外部类实例调用之后调用对象上的函数。

这是我的示例（它应该回显“OKAY！”）：

class class1  {
    function func1()  {
        func3();          // function outside class
    }

    function func2()  {
        echo "AY!";
    }
}

$foo = new class1();
$foo->func1();

function func3()
{
    echo "OK";
    $foo->func2();       // class instance doesn't exist any more
}

Answer 1

class class1  {
    function func1()  {
        func3($this);          // function outside class
    }

    function func2()  {
        echo "AY!";
    }
}

$foo = new class1();
$foo->func1();

function func3($object)
{
    echo "OK";
    $object->func2();       // class instance doesn't exist any more
}

Answer 2

实例作为参数传递。跟随代码

<?php

class class1  {
    function func1($foo)  {
        func3($foo);          // function outside class
    }

    function func2()  {
        echo "AY!";
    }
}

$foo = new class1();
$foo->func1($foo);

function func3($foo)
{
    echo "OK";
    $foo->func2();       // class instance doesn't exist any more
}
?>

输出：

OKAY!