用于重定向公共URL的正则表达式

Question

我们如何将这两个重定向URL合并（一般化）为一个。

例如：
URL1：(?i)/MathBlog/10-common-math-errors-made-by-elementary-students/ =＆gt; /mathblog/common-math-errors-made-by-elementary-students/

网址2：(?i)/MathBlog/amp/10-common-math-errors-made-by-elementary-students/ =＆gt; /mathblog/amp/common-math-errors-made-by-elementary-students/

应该成为 URL3：(?i)/MathBlog/{regex}/10-common-math-errors-made-by-elementary-students/ =＆gt; /mathblog/{/amp}/common-math-errors-made-by-elementary-students/

{/amp}必须是可选的，即使/amp可用，然后附加到重定向网址或忽略它。

Answer 1

这个怎么样：

(?i)(\/MathBlog(?:\/amp)?\/)10-(common-math-errors-made-by-elementary-students\/) =＆gt; $1$2

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