Convert Codex XML to Apple Dictionary XML

convert-xml.php

<?php

header('Content-type: text/xml');
header('Pragma: public');
header('Cache-control: private');
header('Expires: -1');
echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n";

echo '<d:dictionary xmlns="http://www.w3.org/1999/xhtml" xmlns:d="http://www.apple.com/DTDs/DictionaryService-1.0.rng">' . "\r\n";

$codex = simplexml_load_file('codex.xml');
$count = 0;
foreach( $codex->page as $page )
{
    $title = str_replace( 'Function Reference/', '', $page->title );
    $id = str_replace( ' ', '_', $title );
    
    # Avoid adding translated resources
    if( false !== strpos( $title,':' ) )
	    continue;

    printf('
    <d:entry id="%1$s" d:title="%2$s">
            <d:index d:value="%2$s"/>
            <h1>%2$s</h1>
            <p>%3$s</p>
    </d:entry>',
        $id,
        $title,
        htmlentities( $page->revision->text )
    );    

    echo  "\r\n";
}

echo '</d:dictionary>';