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新手问上这条正则什么意思

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Release： 2016-06-13 10:51:29
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新手问下这条正则什么意思？
$str = preg_replace("/\{pc:(\w+)\s+([^}]+)\}/ie", "self::pc_tag('$1','$2', '$0')", $str);

$1 $2 代表前面的2个子模式， 那么$0代表什么。。。

------解决方案--------------------
$0代表 整个模式

Related labels：
pc quot replace self str
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