I have following URLs
我有以下网址
https://domain.com/baby/smile/love/index.txt
https://domain.com/baby/smile/love/toy.txt
https://domain.com/baby/smile/love/car.html
and so on...
https://domain
阅读背景：
PHP正则表达式删除最后匹配的模式字符串
来源：互联网
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