use strict;
my $str = '<div>
<img class="bumbum"><img src="data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="960" height="640"%3E%3C/svg%3E" />
</div>';
my $regex = qr%<img [^>]*?src=["\']data:image/svg\+xml[^>]+>%p;
my $subst = '';
my $result = $str =~ s%$regex%$subst%rg;
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