Regex Letters Numbers Dashes and Underscores

Question

Im not sure how I can achieve this match expression   Currently I am using      A-Za-z0-9-         which matches letters and numbers   I would also like to match on dashes and underscores in the same expression   Anyone know how   I would like to be able to match product name and product-name

User · Answer

Your expression should already match dashes  because the final - will not be interpreted as a range operator  since the range has no end   To add underscores as well  try     A-Za-z0-9 -

User · Answer

Depending on your regex variant  you might be able to do simply this      w-      Also  you probably don t need the parentheses unless this is part of a larger expression

User · Answer

You can indeed match all those characters  but it s safer to escape the - so that it is clear that it be taken literally   If you are using a POSIX variant you can opt to use       alnum   -      But a since you are including the underscore I would simply use      w -      works in all variants

User · Answer

Just escape the dashes to prevent them from being interpreted  I don t think underscore needs escaping  but it can t hurt   You don t say which regex you are using     A-Za-z0-9 -

[regex] Regex Letters, Numbers, Dashes, and Underscores

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