note 118034 added to mysqli.ping

As jay at grooveshark dot com very helpfully pointed out, the mysqlnd driver which is becoming pretty standard does not obey reconnect commands. If you have a DB wrapper class (which hopefully you do) you can implement your own version of ping() such as: <?php class db extends mysqli { private $db_host; private $db_user; private $db_pass; private $db_name; private $persistent; public function __construct($db_host, $db_user, $db_pass, $db_name, $persistent = true) { $this->db_host = $db_host; $this->db_user = $db_user; $this->db_pass = $db_pass; $this->db_name = $db_name; $this->persistent = $persistent; parent::init(); parent::options(MYSQLI_OPT_CONNECT_TIMEOUT, 1); @parent::real_connect(($this->persistent ? 'p:' : '') . $this->db_host, $this->db_user, $this->db_pass, $this->db_name); if ($this->connect_errno) die("All DB servers down!\n"); } public function ping() { @parent::query('SELECT LAST_INSERT_ID()'); if ($this->errno == 2006) $this->__construct($this->db_host, $this->db_user, $this->db_pass, $this->db_name, $this->persistent); } ... } $db = new db(DB_HOST, DB_USER, DB_PASS, DB_NAME); // Some code that potentially takes a really long time to execute goes here // Ping for safety to try to gracefully reconnect $db->ping(); // Now we should be able to run queries again $db->query('SELECT LAST_INSERT_ID()'); ?> If you wanted you could even put "$this->ping();" at the top of db::query() to avoid any explicit reconnection calls but I wouldn't recommend it due to the (slight) overhead of running the cheap "SELECT LAST_INSERT_ID()" query every time prior to running your real intended query. There are probably even cheaper queries to run in favor of "SELECT LAST_INSERT_ID()" but it was the first that came to mind and is cheap enough for most purposes since you shouldn't be calling ping() a whole bunch anyway. ---- Server IP: 72.52.91.14 Probable Submitter: 50.135.189.87 ---- Manual Page -- http://php.net/manual/en/mysqli.ping.php Edit -- https://master.php.net/note/edit/118034 Del: integrated -- https://master.php.net/note/delete/118034/integrated Del: useless -- https://master.php.net/note/delete/118034/useless Del: bad code -- https://master.php.net/note/delete/118034/bad+code Del: spam -- https://master.php.net/note/delete/118034/spam Del: non-english -- https://master.php.net/note/delete/118034/non-english Del: in docs -- https://master.php.net/note/delete/118034/in+docs Del: other reasons-- https://master.php.net/note/delete/118034 Reject -- https://master.php.net/note/reject/118034 Search -- https://master.php.net/manage/user-notes.php