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php中$$a,是什么意思？该怎么处理

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Release： 2016-06-13 11:39:19
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php中$$a,是什么意思？

$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~~~~

Related labels：
language nbsp php variables
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