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关于php正则匹配的问题

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Release： 2016-06-02 11:28:40
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正则php

汉字字母数字1[汉字字母数字2]数字3 Go

有这样一段html内容，我需要 取得 汉字字母数字1 和 汉字字母数字2 和 数字3 和数字4 其中 [汉字字母数字2] 和 数字3都是有可能出现1次 也有可能一次都不出现。

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