sitemap_generator_cached

sitemap_generator_cached.php

<?php 
header("Content-type: text/xml");

$cache_time = 3600 * 24; // Time in seconds to keep a page cached
$cache_folder = '/'; // Folder to store cached files (no trailing slash)  
$cache_filename = $cache_folder.md5($_SERVER['REQUEST_URI']); // Location to lookup or store cached file  
//Check to see if this file has already been cached  
// If it has get and store the file creation time  
$cache_created  = (file_exists($cache_filename)) ? filemtime($cache_filename) : 0;  
 
if ((time() - $cache_created) < $cache_time) {  

    readfile($cache_filename); // The cached copy is still valid, read it into the output buffer  
    die();
} else {

ob_start();

?>
    <?xml version="1.0" encoding="UTF-8"?>
    <urlset
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd
        http://www.w3.org/1999/xhtml http://www.w3.org/2002/08/xhtml/xhtml1-strict.xsd"
        xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xhtml="http://www.w3.org/1999/xhtml" >
        <?php foreach ($urls as $url): ?>
            <url>
                <?php 
                    $link = CHtml::encode((preg_match('#^http#i', $url['loc']) 
                    ? $url['loc'] 
                    : $this->createAbsoluteUrl($url['loc']))); ?>
                <loc><?php echo $link ?></loc>
                <?php 
                if ($url['alternate']) : 
                    foreach ($url['alternate'] as $l => $link) : 
                        ?>
                        <xhtml:link rel="alternate" hreflang="<?php echo $l ?>" href="<?php echo $link ?>"/>
                        <?php 
                    endforeach; 
                endif; 
                ?>
                <changefreq><?php echo CHtml::encode($url['changefreq']); ?></changefreq>
                <priority><?php echo CHtml::encode($url['priority']); ?></priority>
            </url>
        <?php endforeach; ?>
    </urlset>
<?php

ob_end_flush();

}