正則表達式說明：（？> [^ <>] +）

Question

/(?>[^<>]+)/應該如何解釋？ （PHP RegExp引擎）

謝謝。

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.

如果您對僅一次模式感興趣，請訪問http://www.regextester.com/pregsyntax.html中 Once-only subpatterns模式部分。