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+<?php
+
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at https://github.com/JamesHeinrich/getID3 //
+// or https://www.getid3.org //
+// or http://getid3.sourceforge.net //
+// //
+// extension.cache.mysqli.php - part of getID3() //
+// Please see readme.txt for more information //
+// //
+/////////////////////////////////////////////////////////////////
+// //
+// This extension written by Allan Hansen <ahØartemis*dk> //
+// Table name mod by Carlo Capocasa <calroØcarlocapocasa*com> //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+/**
+* This is a caching extension for getID3(). It works the exact same
+* way as the getID3 class, but return cached information very fast
+*
+* Example: (see also demo.cache.mysql.php in /demo/)
+*
+* Normal getID3 usage (example):
+*
+* require_once 'getid3/getid3.php';
+* $getID3 = new getID3;
+* $getID3->encoding = 'UTF-8';
+* $info1 = $getID3->analyze('file1.flac');
+* $info2 = $getID3->analyze('file2.wv');
+*
+* getID3_cached usage:
+*
+* require_once 'getid3/getid3.php';
+* require_once 'getid3/getid3/extension.cache.mysqli.php';
+* // 5th parameter (tablename) is optional, default is 'getid3_cache'
+* $getID3 = new getID3_cached_mysqli('localhost', 'database', 'username', 'password', 'tablename');
+* $getID3->encoding = 'UTF-8';
+* $info1 = $getID3->analyze('file1.flac');
+* $info2 = $getID3->analyze('file2.wv');
+*
+*
+* Supported Cache Types (this extension)
+*
+* SQL Databases:
+*
+* cache_type cache_options
+* -------------------------------------------------------------------
+* mysqli host, database, username, password
+*
+*
+* DBM-Style Databases: (use extension.cache.dbm)
+*
+* cache_type cache_options
+* -------------------------------------------------------------------
+* gdbm dbm_filename, lock_filename
+* ndbm dbm_filename, lock_filename
+* db2 dbm_filename, lock_filename
+* db3 dbm_filename, lock_filename
+* db4 dbm_filename, lock_filename (PHP5 required)
+*
+* PHP must have write access to both dbm_filename and lock_filename.
+*
+*
+* Recommended Cache Types
+*
+* Infrequent updates, many reads any DBM
+* Frequent updates mysqli
+*/
+
+class getID3_cached_mysqli extends getID3
+{
+ /**
+ * @var mysqli
+ */
+ private $mysqli;
+
+ /**
+ * @var mysqli_result
+ */
+ private $cursor;
+
+ /**
+ * @var string
+ */
+ private $table;
+
+ /**
+ * @var bool
+ */
+ private $db_structure_check;
+
+
+ /**
+ * constructor - see top of this file for cache type and cache_options
+ *
+ * @param string $host
+ * @param string $database
+ * @param string $username
+ * @param string $password
+ * @param string $table
+ *
+ * @throws Exception
+ * @throws getid3_exception
+ */
+ public function __construct($host, $database, $username, $password, $table='getid3_cache') {
+
+ // Check for mysqli support
+ if (!function_exists('mysqli_connect')) {
+ throw new Exception('PHP not compiled with mysqli support.');
+ }
+
+ // Connect to database
+ $this->mysqli = new mysqli($host, $username, $password);
+ if ($this->mysqli->connect_error) {
+ throw new Exception('Connect Error (' . $this->mysqli->connect_errno . ') ' . $this->mysqli->connect_error);
+ }
+
+ // Select database
+ if (!$this->mysqli->select_db($database)) {
+ throw new Exception('Cannot use database '.$database);
+ }
+
+ // Set table
+ $this->table = $table;
+
+ // Create cache table if not exists
+ $this->create_table();
+
+ $this->db_structure_check = true; // set to false if you know your table structure has already been migrated to use `hash` as the primary key to avoid
+ $this->migrate_db_structure();
+
+ // Check version number and clear cache if changed
+ $version = '';
+ $SQLquery = 'SELECT `value`';
+ $SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
+ $SQLquery .= ' WHERE (`filename` = \''.$this->mysqli->real_escape_string(getID3::VERSION).'\')';
+ $SQLquery .= ' AND (`hash` = \'getID3::VERSION\')';
+ if ($this->cursor = $this->mysqli->query($SQLquery)) {
+ list($version) = $this->cursor->fetch_array();
+ }
+ if ($version != getID3::VERSION) {
+ $this->clear_cache();
+ }
+
+ parent::__construct();
+ }
+
+
+ /**
+ * clear cache
+ */
+ public function clear_cache() {
+ $this->mysqli->query('TRUNCATE TABLE `'.$this->mysqli->real_escape_string($this->table).'`');
+ $this->mysqli->query('INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (\'getID3::VERSION\', \''.getID3::VERSION.'\', -1, -1, -1, \''.getID3::VERSION.'\')');
+ }
+
+
+ /**
+ * migrate database structure if needed
+ */
+ public function migrate_db_structure() {
+ // Check for table structure
+ if ($this->db_structure_check) {
+ $SQLquery = 'SHOW COLUMNS';
+ $SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
+ $SQLquery .= ' LIKE \'hash\'';
+ $this->cursor = $this->mysqli->query($SQLquery);
+ if ($this->cursor->num_rows == 0) {
+ // table has not been migrated, add column, add hashes, change index
+ $SQLquery = 'ALTER TABLE `getid3_cache` DROP PRIMARY KEY, ADD `hash` CHAR(32) NOT NULL DEFAULT \'\' FIRST, ADD PRIMARY KEY(`hash`)';
+ $this->mysqli->query($SQLquery);
+
+ $SQLquery = 'UPDATE `getid3_cache` SET';
+ $SQLquery .= ' `hash` = MD5(`filename`, `filesize`, `filetime`)';
+ $SQLquery .= ' WHERE (`filesize` > -1)';
+ $this->mysqli->query($SQLquery);
+
+ $SQLquery = 'UPDATE `getid3_cache` SET';
+ $SQLquery .= ' `hash` = \'getID3::VERSION\'';
+ $SQLquery .= ' WHERE (`filesize` = -1)';
+ $SQLquery .= ' AND (`filetime` = -1)';
+ $SQLquery .= ' AND (`filetime` = -1)';
+ $this->mysqli->query($SQLquery);
+ }
+ }
+ }
+
+
+ /**
+ * analyze file
+ *
+ * @param string $filename
+ * @param int $filesize
+ * @param string $original_filename
+ * @param resource $fp
+ *
+ * @return mixed
+ */
+ public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {
+
+ $filetime = 0;
+ if (file_exists($filename)) {
+
+ // Short-hands
+ $filetime = filemtime($filename);
+ $filesize = filesize($filename);
+
+ // Lookup file
+ $SQLquery = 'SELECT `value`';
+ $SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
+ $SQLquery .= ' WHERE (`hash` = \''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\')';
+ $this->cursor = $this->mysqli->query($SQLquery);
+ if ($this->cursor->num_rows > 0) {
+ // Hit
+ list($result) = $this->cursor->fetch_array();
+ return unserialize(base64_decode($result));
+ }
+ }
+
+ // Miss
+ $analysis = parent::analyze($filename, $filesize, $original_filename, $fp);
+
+ // Save result
+ if (file_exists($filename)) {
+ $SQLquery = 'INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (';
+ $SQLquery .= '\''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\'';
+ $SQLquery .= ', \''.$this->mysqli->real_escape_string($filename).'\'';
+ $SQLquery .= ', \''.$this->mysqli->real_escape_string($filesize).'\'';
+ $SQLquery .= ', \''.$this->mysqli->real_escape_string($filetime).'\'';
+ $SQLquery .= ', UNIX_TIMESTAMP()';
+ $SQLquery .= ', \''.$this->mysqli->real_escape_string(base64_encode(serialize($analysis))).'\'';
+ $SQLquery .= ')';
+ $this->cursor = $this->mysqli->query($SQLquery);
+ }
+ return $analysis;
+ }
+
+
+ /**
+ * (re)create mysqli table
+ *
+ * @param bool $drop
+ */
+ private function create_table($drop=false) {
+ if ($drop) {
+ $SQLquery = 'DROP TABLE IF EXISTS `'.$this->mysqli->real_escape_string($this->table).'`';
+ $this->mysqli->query($SQLquery);
+ }
+ $SQLquery = 'CREATE TABLE IF NOT EXISTS `'.$this->mysqli->real_escape_string($this->table).'` (';
+ $SQLquery .= '`hash` CHAR(32) NOT NULL DEFAULT \'\'';
+ $SQLquery .= ', `filename` VARCHAR(1000) NOT NULL DEFAULT \'\'';
+ $SQLquery .= ', `filesize` INT(11) NOT NULL DEFAULT \'0\'';
+ $SQLquery .= ', `filetime` INT(11) NOT NULL DEFAULT \'0\'';
+ $SQLquery .= ', `analyzetime` INT(11) NOT NULL DEFAULT \'0\'';
+ $SQLquery .= ', `value` LONGTEXT NOT NULL';
+ $SQLquery .= ', PRIMARY KEY (`hash`))';
+ $this->cursor = $this->mysqli->query($SQLquery);
+ echo $this->mysqli->error;
+ }
+}
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