
Jasmine
Administrator
Mar 15, 2001, 6:01 AM
Post #1 of 1
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How can I quote a variable to use in a regexp?
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How can I quote a variable to use in a regexp? The Perl parser will expand $variable and @variable references in regular expressions unless the delimiter is a single quote. Remember, too, that the right-hand side of a s/// substitution is considered a double-quoted string (see the perlop manpage for more details). Remember also that any regexp special characters will be acted on unless you precede the substitution with \Q. Here's an example:
$string = "to die?"; $lhs = "die?"; $rhs = "sleep no more"; $string =~ s/\Q$lhs/$rhs/; # $string is now "to sleep no more" Without the \Q, the regexp would also spuriously match ``di''.
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