SESSION Management Library-PHP source code

SESSION Management Library SESSION management library can be stored in databases, memcached, files, and stored by directory

Source code

 Hoojar studio ** module: wcore/session. php * Brief description: library dedicated to SESSION processing * author: liuqi-> * version: $ Id: session. php 1 2012-11-20 05: 55: 12Z Administrator $ * copyright: PHP Chinese Network **/class wcore_session {/*** SESSION array ** @ var array */public $ data = array (); /*** in which material the SESSION is stored ** @ var string storage method * dbmax: 65535 the SESSION content is stored in the database table * mdbmax: 255 session content is stored in the database memory table * memmax: unlimit session content is stored in the Memcache cache * filemax: unlimit session content is stored in the file * dirmax: Unlimit session content is stored in files in different directories */private $ _ type = 'file '; /*** path of the SESSION file stored when the storage mode is file or dir ** @ var string SESSION file storage path */private $ _ path = '/tmp '; /*** module object for data connection ** @ var wcore_mysql */private $ _ db = null; /*** data table to be operated when the SESSION is stored in the database ** @ var string database table name (common table [session_wcore] and memory table [session_mem]) */private $ _ opt = 'session _ wcore';/*** module object connecting MEM ** @ var wcore_mem */private $ _ mem = null; /*** SESSION life, default The value is 30 minutes in seconds ** @ var integer */private $ _ life_time = 1800; /*** SESSION prefix ** @ var string */private $ _ prefix = 'Ws '; /*** ip address ** @ var integer */private $ _ ip = ''; /*** initialize SESSION ** @ param string $ type the storage mode of the SESSION * @ param integer $ ltime the duration of the SESSION is measured in minutes * @ param string $ path path * @ param string $ prefix SESSION file prefix * @ param boolean $ start whether to enable SESSION processing immediately */public function _ construct ($ type = 'File ', $ Ltime = 30, $ path = '', $ prefix = 'Ws ', $ start = true) {$ this-> _ prefix = $ prefix; $ this-> _ type = strtolower ($ type); if ($ this-> _ type = 'file' | $ this-> _ type = 'dir ') {$ this-> _ path = ($ path & file_exists ($ path ))? $ Path: get_1__var ('session. save_path '); wcore_fso: make_dir ($ this-> _ path ); // process the SESSION storage path} $ this-> _ life_time = ($ ltime & is_numeric ($ ltime ))? $ Ltime * 60: get_cfg_var ('session. gc_maxlifetime '); $ this-> _ ip = wcore_utils: get_ip (); session_set_save_handler (array (& $ this, 'open'), array (& $ this, 'close'), array (& $ this, 'read'), array (& $ this, 'write'), array (& $ this, 'deststroy '), array (& $ this, 'gc '); register_shutdown_function ('session _ write_close');/*** whether to enable session processing immediately */if ($ start) {ini_set ('session. use_cookies ', 'on'); ini_set ('session. use_trans _ Sid ', 'off'); session_set_cookie_params (0,'/'); session_start () ;}$ this-> data = & $ _ SESSION ;} /*** open SESSION ** @ param string $ path SESSION storage path * @ param string $ name SESSION name * @ return boolean */public function open ($ path, $ name) {if ($ this-> _ type = 'DB' | $ this-> _ type = 'mdb ') // process SESSION {$ this-> _ db = wcore_object: mdb (); if ($ this-> _ type = 'mdb ') in the database mode ') {$ this-> _ opt = 'session _ mem ';} else if ($ this-> _ ty Pe = 'mem ') // process SESSION {$ this-> _ mem = wcore_object: mem () in Memcache buffer mode (); $ this-> _ mem-> expire = $ this-> _ life_time/60;} $ this-> gc (0); // delete invalid SESSIONreturn true ;} /*** close SESSION *** @ return boolean */public function close () {return true ;} /*** get the SESSION number ** @ return string */public function get_id () {return session_id ();} /*** read SESSION content ** @ param string $ sid unique SESSION id * @ return string SESSION value */public Function read ($ sid) {/*** process SESSION in database mode */if ($ this-> _ type = 'DB' | $ this-> _ type = 'mdb ') {$ res = $ this-> _ db-> fetch_row ("SELECT sData FROM {$ this-> _ opt} WHERE sId = '{$ sid }';"); return ($ res )? $ Res ['sdata']: '';}/*** process the SESSION in Memcache buffer mode */if ($ this-> _ type = 'mem ') {return $ this-> _ mem-> get ('session ', $ sid );} /*** process the SESSION as a file system */if ($ this-> _ type = 'dir ') {$ sfile = "{$ this-> _ path}/{$ sid [0]}/{$ this-> _ prefix}-{$ sid }";} else {$ sfile = "{$ this-> _ path}/{$ this-> _ prefix}-{$ sid}" ;}if (! File_exists ($ sfile) {return '';} return (string) file_get_contents ($ sfile );} /*** write SESSION content ** @ param string $ sid unique identifier of the SESSION * @ param string $ sdata SESSION content * @ return boolean */public function write ($ sid, $ sdata) {/*** if the SESSION data is null, clear the previous data */if (empty ($ sdata) {$ this-> destroy ($ sid ); return false ;} /*** process SESSION in database mode */if ($ this-> _ type = 'DB' | $ this-> _ type = 'mdb ') {$ expires = time () + $ this-> _ life_time; // SESSION validity period $ SQL = "REPLACE INTO {$ this-> _ opt} (sId, sData, sIp, sExpires) VALUES ('{$ sid }', '{$ sdata}', '{$ this-> _ ip}', {$ expires}) "; $ this-> _ db-> query ($ SQL ); return ($ this-> _ db-> affected_rows ()> 0 )? True: false;}/*** process the SESSION in Memcache buffer mode */if ($ this-> _ type = 'mem ') {$ expires = $ this-> _ life_time/60; // return $ this-> _ mem-> set ('session ', $ sid, $ sdata, $ expires);}/*** process the SESSION as a file system */if ($ this-> _ type = 'dir ') {$ sfile = "{$ this-> _ path}/{$ sid [0]}"; wcore_fso: make_dir ($ sfile ); // process the SESSION storage path $ sfile = "{$ sfile}/{$ this-> _ prefix}-{$ sid }";} else {$ sfile = "{$ this-> _ path}/{$ this-> _ Prefix}-{$ sid} ";} return file_put_contents ($ sfile, $ sdata );} /*** clear SESSION ** @ param string $ sid unique SESSION identifier * @ return boolean clear success return true otherwise false */public function destroy ($ sid = '') {if (empty ($ sid) {$ sid = $ this-> get_id ();} /*** process SESSION in database mode */if ($ this-> _ type = 'DB' | $ this-> _ type = 'mdb ') {$ this-> _ db-> query ("delete from {$ this-> _ opt} WHERE sId = '{$ sid }'"); return ($ this-> _ db-> affected_rows ()> 0 )? True: false;}/*** process the SESSION in Memcache buffer mode */if ($ this-> _ type = 'mem ') {return $ this-> _ mem-> del ('session ', $ sid );} /*** process the SESSION as a file system */if ($ this-> _ type = 'dir ') {$ sfile = "{$ this-> _ path}/{$ sid [0]}/{$ this-> _ prefix}-{$ sid }";} else {$ sfile = "{$ this-> _ path}/{$ this-> _ prefix}-{$ sid}";} return! Empty ($ sfile )? @ Unlink ($ sfile): true;}/*** regularly clears expired sessions ** @ param integer $ max_life_time * @ return boolean */public function gc ($ max_life_time) {if ($ this-> _ type = 'DB' | $ this-> _ type = 'mdb ') // process SESSION {$ this-> _ db-> query ("delete from {$ this-> _ opt} WHERE sExpires <". time ();} else if ($ this-> _ type = 'file') // process SESSION {self :: kill_sfile ($ this-> _ path);} else if ($ this-> _ type = 'dir ')// SESSION {$ dir = 'abcdefghijklmnopqrstuvwxy'; $ len = strlen ($ dir); for ($ I = 0; $ I <$ len; ++ $ I) {self: kill_sfile ("{$ this-> _ path}/{$ dir [$ I]}") ;}} return true ;} /*** delete the session file ** @ param string $ dir the directory where the session file is located * @ param boolean $ no_check whether to determine whether to expire * @ return boolean */private function kill_sfile ($ dir, $ no_check = false) {if ($ no_check) // directly delete the SESSION file without expiration judgment {foreach (glob ("{$ dir}/{$ this-> _ pref Ix}-* ") as $ filename) {@ unlink ($ filename);} return true ;} foreach (glob ("{$ dir}/{$ this-> _ prefix}-*") as $ filename) {if (filemtime ($ filename) + $ this-> _ life_time <time () {@ unlink ($ filename) ;}} return true ;} /*** clear all sessions ** @ return boolean */public function cleanup () {switch ($ this-> _ type) {case 'mem ': return $ this-> _ mem-> flush (); case 'DB': case 'mdb ': return $ this-> _ db-> truncate ($ this-> _ opt); case 'file ': Return self: kill_sfile ($ this-> _ path, true); case 'dir': $ dir = 'abcdefghijklmnopqrstuvwxy'; $ len = strlen ($ dir ); for ($ I = 0; $ I <$ len; ++ $ I) {wcore_fso: rm_dir ($ dir [$ I]);} default: return true ;}}?>