Re: [PBML] Match a var in a regex
- View SourceYes you can, and unless you want to replace each occurence of 'string' with '$var' literally, do not escape the '$'.
For example :
my $str = 'I am a blue butterfly';
my $color = 'red';
$str =~ s/blue/$color/;
print $str; # prints 'I am a red butterfly'
$str =~ s/$color/\$color/;
print $str; # prints 'I am a $color butterfly'
This also illustrates how you can do a completely user-controllable search-and-replace :
my $str = 'What's up doc?';
my $search = 'doc'; # In a real context, $search and $replace might
my $replace = 'bob'; # be given by command-line or CGI script arguments
$str =~ s/$search/$replace/g;
See the perlre manpage for more details and other cool things you can do with regular expressions.
Hope this helps!
----- Original Message -----
From: Joe Catanzaro
Sent: Tuesday, May 27, 2003 1:41 PM
Subject: [PBML] Match a var in a regex
Is it possible for me to do this?
$lines = s/string/$var/;
(obviously I would need to escape the $)
If not, what's the best way for me to use a variable in a regex? Or rather,
what's the best way to do a search and replace with a $var?
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