正则表达式解释：（？＆gt; [^＆lt;＆gt;] +）

Question

这应该如何解释，/(?>[^<>]+)/？ （PHP RegEx引擎）

谢谢。

Answer 1

(?>        # I had to look this up, but apparently this syntax prevents the regex
           # parser from backtracking into whatever is matched in this group if 
           # the rest of the  pattern fails
   [^<>]+  # match ANY character except '<' or '>', 1 or more times. 
         ) # close non-backtrackable group.

对于只对一次性模式感兴趣的人，请查看http://www.regextester.com/pregsyntax.html

中的Once-only subpatterns部分