while ($content =~ m/<\?Function\(\".*?\"\)\?>/g)
{ $_ = $content;
my ($line) = /<\?Function\(\"(.*?)\"\)\?>/;
my (@Params) = split(/\"\,\"/,$line);
$line = some_param_stuff(@Params);
$content =~ s/<\?Function\(\".*?\"\)\?>/$line/; }