rednebmas Posted December 21, 2010 Share Posted December 21, 2010 Hey guys, I am trying to capture stuff inside the parentheses. The problem is that it is possible for parentheses to be inside the sqrt. example string: "sqrt(5^(x+3)-7)" desired output capture: 5^(x+3)-7 desired output: sqrt{5^(x+3)-7} The following captures the correct part but it doesn't work if you put sqrt before it. /\((?:[^()]+|(?R))*\)/ For reference: http://php.net/manual/en/regexp.reference.recursive.php Link to comment https://forums.phpfreaks.com/topic/222272-recursive-reference-but-part-not-recursive/ Share on other sites More sharing options...
rednebmas Posted December 21, 2010 Author Share Posted December 21, 2010 sqrt(\((?:[^()]++|(?1))+\)) Link to comment https://forums.phpfreaks.com/topic/222272-recursive-reference-but-part-not-recursive/#findComment-1149777 Share on other sites More sharing options...
rednebmas Posted December 21, 2010 Author Share Posted December 21, 2010 Sorry, I can't figure out how to edit apost... This: "sqrt(\((?:[^()]++|(?1))+\))" matches "(5^(x+3)-7)" but I need it to match "5^(x+3)-7". How can I remove the outside parentheses? Link to comment https://forums.phpfreaks.com/topic/222272-recursive-reference-but-part-not-recursive/#findComment-1149782 Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.