/**
* Create cache folders
*
* Check individual cache folder for existance, check if folder is writable and create folder if it doesn't exist
*/
function cache_create_folders($dir, $levels = 0)
{
if (!is_dir($dir)) {
if (!@mkdir($dir, 0700)) {
$error = 'Directory <code>' . $dir . '</code> does not exist.<br/>';
}
} elseif (!is_writable($dir)) {
$error = 'Directory <code>' . $dir . '</code> is not writable.<br/>';
}
// check hierarchical folders
if (empty($error) && $levels > 0) {
for ($i = 0; $i < 16; $i++) {
$error .= cache_create_folders($dir . '/' . dechex($i), $levels - 1);
}
}
return $error;
}
/**
* Checks if the cache directories exist and are writable by the webserver.
* If they don't exist it tries to create them. If this fails, too a simple
* error page is displayed.
* The function checks if the MySQL PHP extensions is loaded, too.
*/
function verify_installation($return = false)
{
global $config;
// check MySQL extension
if (!extension_loaded('mysqli')) {
errorpage('MySQL extension for PHP not loaded', '<p>The MySQL extension for PHP is not loaded.</p>
<p>Please make sure the MySQL module for PHP is installed and enabled
in your <code>php.ini</code></p>');
}
// collect all directory-specific errors
$error = '';
// check cache
foreach (array(CACHE => 0, CACHE . '/smarty' => 0, CACHE . '/imdb' => 1, CACHE . '/img' => 1, CACHE . '/thumbs' => 1) as $dir => $hierarchical) {
// check top-level folders
$error .= cache_create_folders($dir, $hierarchical ? (int) $config['hierarchical'] : 0);
}
if ($return) {
return $error;
}
if ($error) {
errorpage('Cache directories not writable', '<p>The cache directories have to be writable by the webserver!</p>
<p>Please fix the following errors:</p>
<p>' . $error . '</p>');
}
}