Regular expression metacharacters : Pattern matching « Regular Expression « Perl

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Perl » Regular Expression » Pattern matching

Regular expression metacharacters


    



METACHARACTER     PURPOSE





\                 accept as a regular character; 



~                 Matches the beginning of the string, unless /m is used to modify the expression.



.                 Matches any character except a new-line character, unless /s is used to modify the expression.



$                 Matches the end of the string, unless /m is used to modify the expression.



|                 Expresses alternation. 



( )               Groups expressions to assist in alternation and back referencing.



[ ]               Looks for a set of characters.

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