Try to plan your extension before you start writing your code.
A good way to do this is to write a sample PHP script that illustrates
how your extension is going to be accessed from a PHP script.
foo bar");
tidy_clean_and_repair($tidy);
ob_start();
tidy_output($tidy);
$clean = ob_get_contents();
ob_end_clean();
echo htmlspecialchars($clean);
?>]]>
set_option("show-body-only", "yes");
$tidy->parse_string("foo bar");
$tidy->clean_and_repair();
$tidy->output();
?>]]>
show_body_only = "yes";
$tidy->parse_string("foo bar");
$tidy->clean_and_repair();
$tidy->output();
?>]]>