PHP object-oriented registry mode, php object-oriented Registry

PHP object-oriented registry mode, php object-oriented Registry

Registry mode may be like a global variable. All modules access data from this global variable, or they can be imagined as the wishing wall or message board of a bar, you can see or rewrite the content above. Here we mainly introduce three types of registry classes (Request level, session level, and application level) by scope ).

Namespace woo \ base;
// Base class abstract class Registry {abstract protected function get ($ key); abstract protected function set ($ key, $ val);} // request level, the life cycle is usually from when a user initiates a request to when the background program replies this request. class RequestRegistry extends Registry {private $ values = array (); private static $ instance; private function _ construct (){}
Static function instance () {// Singleton, that is, this class has only one unique instance if (! Isset (self ::$ instance) {self ::$ instance = new self ();} return self ::$ instance;} protected function get ($ key) {if (isset ($ this-> values [$ key]) {return $ this-> values [$ key];} return null;} protected function set ($ key, $ val) {$ this-> values [$ key] = $ val;} static function getRequest () {return self: instance () -> get ('request');} static function setRequest (\ woo \ controller \ request $ Request) {// \ woo \ contr The main function of oller \ Request is to process user request information. return self: instance ()-> set ('request', $ request) ;}// session level, in this example, the class life cycle mainly depends on the SESSION life time class SessionRegistry extends Registry {private static $ instance; private function _ construct () {session_start ();} static function instance () {if (! Isset (self ::$ instance) {self ::$ instance = new self ();} return self ::$ instance;} protected function get ($ key) {if (isset ($ _ SESSION [_ CLASS _] [$ key]) {return $ _ SESSION [_ CLASS _] [$ key];} return null;} protected function set ($ key, $ val) {$ _ SESSION [_ CLASS _] [$ key] = $ val ;} function setComplex (Complex $ complex) {self: instance ()-> set ('complex ', $ complex);} function getComplex () {return self: insta Nce ()-> get ('compute') ;}// application level. In this example, if the file exists, the saved value also exists in the class ApplicationRegistry extends Registry {private Static $ instance; private $ freezedir = 'data'; private $ values = array (); private $ mtimes = array (); private function _ construct () {} static function instance () {if (! Isset (self ::$ instance) {self ::$ instance = new self ();} return self ::$ instance;} protected function get ($ key) {$ path = $ this-> freezedir. DIRECTORY_SEPARATOR. $ key; // path of the file storing the value if (file_exists ($ path) {clearstatcache (); // delete the file modification time of the last record cached by filemtime $ mtime = filemtime ($ path); if (! Isset ($ this-> mtimes [$ key]) {$ this-> mtimes [$ key] = 0 ;} if ($ mtime> $ this-> mtimes [$ key]) {// if the file content has been modified, the value $ data = file_get_contents ($ path); $ this-> mtimes [$ key] = $ mtime; return ($ this-> values [$ key] = unserialize ($ data) ;}} if (isset ($ this-> values [$ key]) {return $ this-> values [$ key];} return null;} protected function set ($ key, $ val) {$ this-> values [$ key] = $ val; $ path = $ this-> freezedir. DIRECTORY_SEPARATOR. $ key; file_put_contents ($ path, serialize ($ val); $ this-> mtimes [$ key] = time ();} static function getDSN () {return self :: instance ()-> get ('dsn ');} static function setDSN ($ dsn) {return self: instance ()-> set ('dsn ', $ dsn );}}