Question

How can I replace the backslash inside the variable?

$string = 'a\cc\ee';
$re = 'a\\cc';
$rep = "Work";

#doesnt work in variable
$string =~ s/$re/$rep/og;
print $string."\n";

#work with String
$string =~ s/a\\cc/$rep/og;
print $string."\n";

output:

a\cc\ee
Work\ee

Answer 1

Because you’re using this inside of a regex — you probably want quotemeta() or \Q and \E (see perldoc perlre)

perl -E'say quotemeta( q[a/asf$#@ , d] )'

# prints: a\/asf\$\#\@\ \,\ d

# Or, with `\Q`, and `\E`
$string =~ s/\Q$re\E/$rep/og;
print $string."\n";