Session_set_save_handler text Pattern Implementation _php Tutorial

1, constructs the session abstract class, realizes the Session_set_save_hanlder function must the basic function

Php /* implement session storage operations using file form or database and other forms * Author:libin * data:2014-06-24 * abstract Top level */ Abstract class Session { /* Open:: Set storage Path */ Abstract Public function open (); /* Close :: Closing the storage mode handle */ Abstract Public function close (); /* read:: According to the key query corresponding value, a typical key value pair */ Abstract Public functionRead $key ); /* write:: Writing session */ Abstract Public functionWrite $key, $value ); /* destory:: Destroying the session of a key */ Abstract Public functionDestory ( $key ); /* GC:: Recycle mechanism to clear expired time (minutes) session data */ Abstract Public functiongc $min= 0 ); /* Start:: Open Session method Override */ Abstract Public function start ();}?> View Code

2, write txt text mode concrete method implementation class

Php /* implement the session using file form or other forms of database, such as storage operations * Author:libin * data:2014-06-24 * TEXT (TXT) Implementation method */ classSession_txt extends Session { /* Variable Storage */ Private $save _path= ''; // Session Save Path Private $file _path= ''; // Session file Path Private $save _name= ''; // Session naming Private $save _hand= NULL; // Resource Handle Private $save _prefix= ' Mysession_ '; // Session prefix /* Open:: Set storage Path */ Final Public function Open () { $this->save_path = ' D:\session ' ; if(! Is_dir( $this- Save_path)) { if(! mkdir( $this- Save_path)) { return false ; }; } $this->GC (); // Enable recycle mechanism return true ; } /* Close :: Closing the storage mode handle */ Final Public function Close () { return true ; } /* read:: According to the key query corresponding value, a typical key value pair */ Final Public functionRead $key ){ $this->set ( __function__, $key ); $data= @ fread( $this->save_hand, filesize( $this- file_path)); if( Empty( $data) || $data== '' ){ return'' ; } return $data ; } /* write:: Writing session */ Final Public functionWrite $key, $value ){ $this->set ( __function__, $key ); return@ fwrite( $this->save_hand, $value ); } /* destory:: Destroying the session of a key */ Final Public functionDestory ( $key ){ $this->set ( __function__, $key ); return@ unlink( $this- File_path); } /* GC:: Recycle mechanism to clear expired time (minutes) session data */ Final Public functiongc $min= 10 ){ $hand= @ Opendir( $this->save_path); // Open Folder while( $file= @ Readdir( $hand)){ // Traverse Folder if( Is_file( $this->save_path. ' /'. $file)){ // If for file, exclude. | | $fileatime= Fileatime( $this->save_path. ' /'. $file); // get file Last modified time if((( Time() - $fileatime)/> $min){ // If the time difference is greater than $min minutes unlink( $this->save_path. ' /'. $file); // perform file cleanup function } } } return true ; } # ################################################################################ /* MAGIC __set */ Final Public function__set ( $key, $value ){ $this- $key= $value ; return true ; } /* Get storage handle */ Final Private functionSet $mode= ' Read ', $key ){ $this->file_path = $this->save_path. ' /'. $this->save_prefix. $key; // Set File path if( $mode! = ' read ' && $mode! = ' Write ') { return false ;}; $mode= $mode= = ' Write '? ' W ': ' R '; // Read or write $this->save_hand = @ fopen( $this->file_path, $mode ); } /* Start:: Open Session method 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, realize the last step of Factory mode

 Php/*implement the session using file form or other forms of database, such as storage operations * Author:libin * DATA:2014-06-24 * Factory mode*/    class_session_start {/*constructor Function*/        Static  Public function__start ($mode= ' txt '){            require_once(' session.class.php ');//Loading abstract methods            if(!require_once(' function/'.$mode.'. Php)){                return false; }Else{                $session _handle= ' Session_ '.$mode; $handler=New $session _handle(); $handler-start (); } }} _session_start:: __start (' txt ');//rewrite session function start?>

PS:: Tomorrow write MySQL to achieve this function, today is the end of the day!

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