note 130560 added to function.register-shutdown-function

Here is a great example of using shutdown. I am using a database class for 20 years now. Starting with mysql_connect of course. then transformed it to mysqli as time went by. It was a real transition at some point. It recently came to my attention that die() and exit() will not handle mysql_close() $con->close properly. __destruct might not be called. so a good way around this is register the shutdown function so mysql will always close. function __destruct(){ $this->close(); } function close() { // this function closes the database if($this->connected){ if($this->use_mysqli){ $this->connected = false; return $this->con->close(); } else { $this->connected = false; return mysql_close($this->con); } } } function __construct($host, $user, $pass, $db){ global $_CONFIG; if(isset($_CONFIG['use_mysql']) && $_CONFIG['use_mysql']){ $this->use_mysqli = false; } else { $this->use_mysqli = function_exists("mysqli_connect"); } $this->database($host, $user, $pass, $db); register_shutdown_function([$this, 'close']); } By Jacob Slomp ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.84.18 (proxied: 162.157.229.111) ---- Manual Page -- https://php.net/manual/en/function.register-shutdown-function.php Edit -- https://main.php.net/note/edit/130560 Del: integrated -- https://main.php.net/note/delete/130560/integrated Del: useless -- https://main.php.net/note/delete/130560/useless Del: bad code -- https://main.php.net/note/delete/130560/bad+code Del: spam -- https://main.php.net/note/delete/130560/spam Del: non-english -- https://main.php.net/note/delete/130560/non-english Del: in docs -- https://main.php.net/note/delete/130560/in+docs Del: other reasons-- https://main.php.net/note/delete/130560 Reject -- https://main.php.net/note/reject/130560 Search -- https://main.php.net/manage/user-notes.php