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看不懂这个语法了,该如何解决

WBOY
Release： 2016-06-13 12:26:31
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看不懂这个语法了

<br />    /**<br />     * Get a Carbon instance for the current date and time<br />     *<br />     * @param DateTimeZone|string $tz<br />     *<br />     * @return static<br />     */<br />    public static function now($tz = null)<br />    {<br />        return new static(null, $tz);<br />    }<br />
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这个是Carbon类里返回当前时间的方法，想问直接return一个static是啥用法。实际发生了什么呢。
------解决思路----------------------
后期静态绑定 http://php.net/manual/zh/language.oop5.late-static-bindings.php
------解决思路----------------------
你看到的只是這個函數的參數和返回值，實際處理方法被隱藏了

Related labels：
carbon nbsp null return static
source：php.cn
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