Returns the substring of the match from the source string. Capturing groups can be retrieved by providing its group number as an integer or its string name (if it's a named group). The default value of 0 refers to the whole pattern.
Returns an empty string if the group did not match or doesn't exist.
Returns the substring of the match from the source string. Capturing groups can be retrieved by providing its group number as an integer or its string name (if it's a named group). The default value of 0 refers to the whole pattern. Returns an empty string if the group did not match or doesn't exist.