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Click here to download plain text source code.

# subroutine name: safe_tag
# HTML-encodes string (prepare data for HTML output)
# Replaces:
# & -> &
# < -> <
# > -> >
# " -> "
# \x0D -> remove
sub safe_tag {
    my ($input) = @_;
    $input =~ s/&/&/sg;
    $input =~ s/\</</sg;
    $input =~ s/\>/>/sg;
    $input =~ s/\"/"/sg;
    $input =~ s/\x0D//sg;
    $input=~s/([\x01-\x08\x0B-\x1F])/"&#".ord($1).";"/esg;
    $input;
}
 
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