Character Class: Remembered Characters : Character Class « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. Character Class

Character Class: Remembered Characters

    

Metacharacter               What It Matches
(string)                    Used for backreferencing (see Examples 9.38 and 9.39)
\1 or $1                    Matches first set of parentheses[a]
\2 or $2                    Matches second set of parentheses
\3 or $3                    Matches third set of parentheses








Related examples in the same category

1.Character Class: Alternative Characters
2.Character Class: Anchored Characters
3.Character Class: Miscellaneous Characters
4.Character Class: Repeated Characters
5.Character Class: Whitespace Characters
6.Match any number of alphanumerics followed by a single space character
7.Match at least one alphanumeric followed by a single space character
8.Posix and Unicode Classes
9.The bracket metacharacters and negation
10.The bracketed character class