Session_set_save_handler: text mode implementation _ PHP Tutorial

Session_set_save_handler: text mode implementation. 1. create a session abstract class to implement the basic functions required by the Session_set_save_hanlder function? Php * implements session storage operations in the form of files or databases * au 1. constructs session Abstract classes to implement the basic functions required by the Session_set_save_hanlder function.

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2. Compile the txt text mode method implementation class

Save_path = 'd: \ session; if (! Is_dir ($ this-> save_path) {if (! Mkdir ($ this-> save_path) {return false ;}}$ this-> gc (); // enable the recycle mechanism return true;}/* close :: close storage mode handle */final public function close () {return true;}/* read: query the corresponding value based on the key, typical key-value pair */final public function read ($ key) {$ this-> set (_ function __, $ key ); $ data = @ fread ($ this-> save_hand, filesize ($ this-> file_path); if (empty ($ data) | $ data = '') {return '';} return $ data;}/* write: write session */final pu Blic function write ($ key, $ value) {$ this-> set (_ function __, $ key); return @ fwrite ($ this-> save_hand, $ value);}/* destory: destroy the session of a key */final public function destory ($ key) {$ this-> set (_ function __, $ key); return @ unlink ($ this-> file_path);}/* gc: reclaim mechanism, clear expiration time (minutes) session Data */final public function gc ($ min = 10) {$ hand = @ opendir ($ this-> save_path ); // open the folder while ($ file = @ readdir ($ hand) {// traverse the folder if (Is_file ($ this-> save_path. '/'. $ file) {// exclude files. | .. $ fileatime = fileatime ($ this-> save_path. '/'. $ file); // Obtain the last modification time of a file. if (time ()-$ fileatime)/60)> $ min) {// if the time difference is greater than $ min minutes unlink ($ this-> save_path. '/'. $ file); // execute the file cleanup function }}return true ;} ######################################## ######################################## #/* MAGIC _ SET */final public function _ set ($ key, $ value) {$ this-> $ key = $ v Alue; return true;}/* get the storage handle */final private function set ($ mode = 'read', $ key) {$ this-> file_path = $ this-> save_path. '/'. $ this-> save_prefix. $ key; // Set the file path if ($ mode! = 'Read' & $ mode! = 'Write') {return false ;}; $ mode = 'write '? 'W': 'R'; // read or write $ this-> save_hand = @ fopen ($ this-> file_path, $ mode);}/* start :: enable the session method to override */final public function start () {@ session_set_save_handler (array ($ this, 'open'), array ($ this, 'close '), array ($ this, 'read'), array ($ this, 'write'), array ($ this, 'destory '), array ($ this, 'gc '); ob_start (); session_start (); ob_end_flush () ;}}?>View Code

3. introduce session. php to implement the factory mode.

 Start () ;}}_ session_start ::__ start ('txt '); // rewrite the start of the session function?>

PS: Minger writes mysql to implement this function. so far today!

Why? Php/* implements session storage operations using the file format or database and other forms * au...