function getID3_cached_dbm($cache_type, $dbm_filename, $lock_filename)
{
// Check for dba extension
if (!extension_loaded('dba')) {
die('PHP is not compiled with dba support, required to use DBM style cache.');
}
// Check for specific dba driver
if (function_exists('dba_handlers')) {
// PHP 4.3.0+
if (!in_array('db3', dba_handlers())) {
die('PHP is not compiled --with ' . $cache_type . ' support, required to use DBM style cache.');
}
} else {
// PHP <= 4.2.3
ob_start();
// nasty, buy the only way to check...
phpinfo();
$contents = ob_get_contents();
ob_end_clean();
if (!strstr($contents, $cache_type)) {
die('PHP is not compiled --with ' . $cache_type . ' support, required to use DBM style cache.');
}
}
// Create lock file if needed
if (!file_exists($lock_filename)) {
if (!touch($lock_filename)) {
die('failed to create lock file: ' . $lock_filename);
}
}
// Open lock file for writing
if (!is_writeable($lock_filename)) {
die('lock file: ' . $lock_filename . ' is not writable');
}
$this->lock = fopen($lock_filename, 'w');
// Acquire exclusive write lock to lock file
flock($this->lock, LOCK_EX);
// Create dbm-file if needed
if (!file_exists($dbm_filename)) {
if (!touch($dbm_filename)) {
die('failed to create dbm file: ' . $dbm_filename);
}
}
// Try to open dbm file for writing
$this->dba = @dba_open($dbm_filename, 'w', $cache_type);
if (!$this->dba) {
// Failed - create new dbm file
$this->dba = dba_open($dbm_filename, 'n', $cache_type);
if (!$this->dba) {
die('failed to create dbm file: ' . $dbm_filename);
}
// Insert getID3 version number
dba_insert(GETID3_VERSION, GETID3_VERSION, $this->dba);
}
// Init misc values
$this->cache_type = $cache_type;
$this->dbm_filename = $dbm_filename;
// Register destructor
register_shutdown_function(array($this, '__destruct'));
// Check version number and clear cache if changed
if (dba_fetch(GETID3_VERSION, $this->dba) != GETID3_VERSION) {
$this->clear_cache();
}
parent::getID3();
}
function getID3_cached_mysql($host, $database, $username, $password)
{
// Check for mysql support
if (!function_exists('mysql_pconnect')) {
throw new Exception('PHP not compiled with mysql support.');
}
// Connect to database
$this->connection = mysql_pconnect($host, $username, $password);
if (!$this->connection) {
throw new Exception('mysql_pconnect() failed - check permissions and spelling.');
}
// Select database
if (!mysql_select_db($database, $this->connection)) {
throw new Exception('Cannot use database ' . $database);
}
// Create cache table if not exists
$this->create_table();
// Check version number and clear cache if changed
$version = '';
if ($this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename` = '" . mysql_real_escape_string(GETID3_VERSION) . "') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')", $this->connection)) {
list($version) = mysql_fetch_array($this->cursor);
}
if ($version != GETID3_VERSION) {
$this->clear_cache();
}
parent::getID3();
}
public function getID3_cached_dbm($cache_type, $dbm_filename, $lock_filename)
{
// Check for dba extension
if (!extension_loaded('dba')) {
throw new Exception('PHP is not compiled with dba support, required to use DBM style cache.');
}
// Check for specific dba driver
if (!function_exists('dba_handlers') || !in_array($cache_type, dba_handlers())) {
throw new Exception('PHP is not compiled --with ' . $cache_type . ' support, required to use DBM style cache.');
}
// Create lock file if needed
if (!file_exists($lock_filename)) {
if (!touch($lock_filename)) {
throw new Exception('failed to create lock file: ' . $lock_filename);
}
}
// Open lock file for writing
if (!is_writeable($lock_filename)) {
throw new Exception('lock file: ' . $lock_filename . ' is not writable');
}
$this->lock = fopen($lock_filename, 'w');
// Acquire exclusive write lock to lock file
flock($this->lock, LOCK_EX);
// Create dbm-file if needed
if (!file_exists($dbm_filename)) {
if (!touch($dbm_filename)) {
throw new Exception('failed to create dbm file: ' . $dbm_filename);
}
}
// Try to open dbm file for writing
$this->dba = dba_open($dbm_filename, 'w', $cache_type);
if (!$this->dba) {
// Failed - create new dbm file
$this->dba = dba_open($dbm_filename, 'n', $cache_type);
if (!$this->dba) {
throw new Exception('failed to create dbm file: ' . $dbm_filename);
}
// Insert getID3 version number
dba_insert(getID3::VERSION, getID3::VERSION, $this->dba);
}
// Init misc values
$this->cache_type = $cache_type;
$this->dbm_filename = $dbm_filename;
// Register destructor
register_shutdown_function(array($this, '__destruct'));
// Check version number and clear cache if changed
if (dba_fetch(getID3::VERSION, $this->dba) != getID3::VERSION) {
$this->clear_cache();
}
parent::getID3();
}
function getID3_cached_mysql(&$db)
{
// Check version number and clear cache if changed
$this->database =& $db;
$this->database->setQuery("SELECT `value` FROM `#__zoom_getid3_cache` WHERE (`filename` = '" . GETID3_VERSION . "') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')");
$this->cursor = $this->database->query();
list($version) = @mysql_fetch_array($this->cursor);
if ($version != GETID3_VERSION) {
$this->clear_cache();
}
parent::getID3();
}
function getID3_cached_mysql($host, $database, $username, $password)
{
// Check for mysql support
if (!function_exists('mysql_pconnect')) {
throw new Exception('PHP not compiled with mysql support.');
}
// Connect to database
$this->connection = mysql_pconnect($host, $username, $password);
if (!$this->connection) {
throw new Exception('mysql_pconnect() failed - check permissions and spelling.');
}
// Select database
if (!mysql_select_db($database, $this->connection)) {
throw new Exception('Cannot use database ' . $database);
}
// Create cache table if not exists
$this->create_table();
// Check version number and clear cache if changed
// $$$ hugh - fix for $this::VERSION, as per main getid3.php fixes.
// can't use $this::VERSION syntax, even conditionally, since it registers as a parse error before PHP v5.3.0
// wrapping the new syntax in an eval call should work without causing parse errors in old PHP
/*
if ($this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename` = '".mysql_real_escape_string($this::VERSION)."') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')", $this->connection)) {
list($version) = mysql_fetch_array($this->cursor);
}
if ($version != $this::VERSION) {
$this->clear_cache();
}
*/
$version = '';
$this_version = '';
eval('$this_version = $this::VERSION;');
if ($this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename` = '" . mysql_real_escape_string($this_version) . "') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')", $this->connection)) {
list($version) = mysql_fetch_array($this->cursor);
}
if ($version != $this_version) {
$this->clear_cache();
}
parent::getID3();
}
