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How do I escape special characters like . / or | in a regular expression?

by vroom (Pope)
on Jan 21, 2000 at 00:47 UTC ( #2260=categorized question: print w/replies, xml ) Need Help??
Contributed by vroom on Jan 21, 2000 at 00:47 UTC
Q&A  > regular expressions


Answer: How do I escape special characters like . / or in a regular expression?
contributed by arhuman

use quotemeta.

Answer: How do I escape special characters like . / or in a regular expression?
contributed by vroom

Precede the special characters with \ ie:

$filename=~/.*\.txt$/ # matches anything ending with .txt;
Answer: How do I escape special characters like . / or in a regular expression?
contributed by Codmate

It is possible to use another character (other than "/") to make a regex. A hash symbol can be used for example:

$changeme = "/this/url/would/be/a/nightmare/in/regex/"; $changeme =~ s#would/be#is/not#;
You can also escape all special characters in a regex with "\Q" and "\E" like this:
$changeme = "/this/url/wo*ld/b^e/a/nightmare/in/regex/"; $changeme =~ s/\Qwo*ld/b^e\E/\Qis/not\E/;
Answer: How do I escape special characters like . / or in a regular expression?
contributed by ariels

Use the quotemeta function. Or, inside a "double-quotish context" (such as a regexp), you may use \Q...\E to get "..." literally.

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