(PHP 5 >= 5.1.0)
tidy::getOptDoc -- tidy_get_opt_doc — Returns the documentation for the given option name
Object oriented style
$optname
   )Procedural style
tidy_get_opt_doc() returns the documentation for the given option name.
Note:
You need at least libtidy from 25 April, 2005 for this function be available.
   Returns a string if the option exists and has documentation available, or
   FALSE otherwise.
  
Example #1 Print all options along with their documentation and default value
<?php
$tidy = new tidy;
$config = $tidy->getConfig();
ksort($config);
foreach ($config as $opt => $val) {
    if (!$doc = $tidy->getOptDoc($opt))
        $doc = 'no documentation available!';
    $val = ($tidy->getOpt($opt) === true)  ? 'true'  : $val;
    $val = ($tidy->getOpt($opt) === false) ? 'false' : $val;
    echo "<p><b>$opt</b> (default: '$val')<br />".
         "$doc</p><hr />\n";
}
?>