正则表达式在线分析 regex online analyzer

https://regexper.com/#%2F%5B0-9%5D%5Cs%5B0-9%5D%2Fless

https://regexper.com/regexp

 

http://regexone.com/lesson/more_groupsblog

1280x720  提取出1280 720get

((\d+)\D(\d+))sso

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