use strict;
my $str = '€123 123 252,65
';
my $regex = qr/^([$€£¥]\s{0,1}){0,1}((([0-9]{1,3}\s{0,1}){0,1}([0-9]{3}\s{0,1})*(,[0-9]{2}){0,1}))(\s{0,1}[$€£¥]){0,1}$/p;
my $subst = '';
my $result = $str =~ s/$regex/$subst/r;
print "The result of the substitution is' $result\n";
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html