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php中$$a,是什么意思？

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Release： 2016-06-23 14:26:26
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$a="cd";
$$a="finished";
$$a="OK";
echo $cd;
?>
输出结果为“OK”

请问$$a 是什么意思啊？这个结果是怎么回事啊，小弟是小白，往各位大牛们告知啊~~~~


回复讨论(解决方案)

http://www.php.net/manual/zh/language.variables.variable.php

十分感谢 斑竹xuzuning啊

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php中$$a 是什么意思？
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