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看不懂这个语法了

WBOY
WBOYOriginal
2016-06-23 13:24:04798browse

    /**     * Get a Carbon instance for the current date and time     *     * @param DateTimeZone|string $tz     *     * @return static     */    public static function now($tz = null)    {        return new static(null, $tz);    }


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。


回复讨论(解决方案)

后期静态绑定  http://php.net/manual/zh/language.oop5.late-static-bindings.php

你看到的只是??函?的??和返回值,???理方法被?藏了

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