Over the years I have slowly developed a regular expression that validates most email addresses correctly, assuming they don't use an IP address as the server part. I use it in several PHP programs...

How do I make an expression to match absolutely anything (including whitespaces)? Example: Regex: I bought _____ sheep. Matches: I bought sheep. I bought a sheep. I bought five sheep. I tried usi...

I discovered that the UK Government's regex pattern is incorrect and fails to properly validate some postcodes. Unfortunately, many of the answers here are based on this incorrect pattern. I'll outline …

Jan 19, 2012 · 139 I'm looking how to replace/encode text using RegEx based on RegEx settings/params below: ... I have seen some examples on RegEx, but confused as to how to apply it …

Feb 24, 2023 · You may also sometimes need to match newlines in Java regexes in contexts where you cannot pass Pattern.DOTALL, such as when doing a multi-line regex search in Eclipse, or as a user …

If you're looking to capture everything up to "abc": /^(.*?)abc/ Explanation: ( ) capture the expression inside the parentheses for access using $1, $2, etc. ^ match start of line .* match anything, ? non …

Jan 2, 2009 · The regex (?!hede). looks ahead to see if there's no substring "hede" to be seen, and if that is the case (so something else is seen), then the . (dot) will match any character except a line …

Mar 11, 2012 · How can I make the following regex ignore case sensitivity? It should match all the correct characters but ignore whether they are lower or uppercase. G[a-b].*

Here's an example: ... JSFiddle demo here. In the general case, escape the string before using as regex: Not every string is a valid regex, though: there are some speciall characters, like ( or [. To …

By putting ^ at the beginning of your regex and $ at the end, you ensure that no other characters are allowed before or after your regex. For example, the regex [0-9] matches the strings "9" as well as …