A php page cache class

A php page cache class

/* $ Cache = new Cache ("../cache/", 20); // Constructor to create a cache class object $ Cache-> PutCache (); // reverse cache */ Class Cache { Private $ CacheDir = 'cache';/* Cache directory */ Private $ SetTimeOut = 10;/* cache expiration time */ Private $ SetExt = '. cache';/* cache file suffix */ Private $ CacheFileUrl = '';/* address of the cached file */ Private $ CacheConfigFile = '';/* cache file configuration information */ Public $ LastUnixTimePoke = 0;/* The last cached Unix timestamp */ Public $ CurrentUnixTimePoke = 0;/* Unix timestamp currently cached */ Public $ NextUnixTimePoke = 0;/* Unix timestamp cached next time */ Public $ UnixNowToNext = 0;/* Unix timestamp that is different from the next cache */ Public $ LastTimePoke = 0;/* last cache time */ Public $ CurrentTimePoke = 0;/* current cache time */ Public $ NextTimePoke = 0;/* The next cache time */ Public $ DataLength = 0;/* cache content length */ Public $ CacheToPage = '';/* cache file content */ Private $ SplitTeam = false;/* Whether to group and store Cache files */ Public $ Cache = false;/* whether the Cache is required, which is determined by the user */ Private $ _ IsCache = false;/* indicates whether data can be cached */ Public function Cache ($ SetTimeOut = 20, $ CacheDir = 'cache', $ SplitTeam = false, $ SetExt = '. cache ') { $ This-> CacheDir = $ CacheDir; $ This-> SplitTeam = $ SplitTeam; If (! Is_numeric ($ SetTimeOut )) { $ This-> ErrResponse ('invalid cache expiration time settings '); Return false; } Else { $ This-> SetTimeOut = $ SetTimeOut; } $ This-> SetExt = $ SetExt; /* Cache start */ Ob_clean (); Ob_start (); Ob_implicit_flush (0 ); $ This-> CreateCache (); Return true; } Private function CreateCache () { $ _ CacheFile = str_replace ('.', '_', basename ($ _ SERVER ['php _ SELF ']).' _ '. Md5 (basename ($ _ SERVER ['php _ SELF ']). $ this-> SetExt; $ _ CacheConfig = str_replace ('.', '_', basename ($ _ SERVER ['php _ SELF ']).' _ '.'. cof '; If (! File_exists ($ this-> CacheDir )) { Mkdir ($ this-> CacheDir, 0777 ); } If ($ this-> SplitTeam) { $ _ CacheConfigDir = $ this-> CacheDir. str_replace ('.', '_', basename ($ _ SERVER ['php _ SELF ']).' _/'; If (! File_exists ($ _ CacheConfigDir )) { Mkdir ($ _ CacheConfigDir, 0777 ); } $ _ CacheUrl = $ this-> CacheDir. $ _ CacheConfigDir. $ _ CacheFile; $ _ CacheConfigUrl = $ this-> CacheDir. $ _ CacheConfigDir. $ _ CacheConfig; } Else { $ _ CacheUrl = $ this-> CacheDir. $ _ CacheFile; $ _ CacheConfigUrl = $ this-> CacheDir. $ _ CacheConfig; } If (! File_exists ($ _ CacheUrl )) { $ Hanld = @ fopen ($ _ CacheUrl, "w "); @ Fclose ($ hanld ); } If (! File_exists ($ _ CacheConfigUrl )) { $ Hanld = @ fopen ($ _ CacheConfigUrl, "w "); @ Fclose ($ hanld ); } $ This-> CacheConfigFile =$ _ CacheConfigUrl; $ This-> CacheFileUrl =$ _ CacheUrl; $ This-> CheckCache (); Return true; } Private function CheckCache () { $ _ FileEditTime = @ filemtime ($ this-> CacheFileUrl ); $ _ TimeOut = $ this-> SetTimeOut; $ _ IsTimeOut =$ _ FileEditTime $ _ TimeOut; $ This-> LastUnixTimePoke =$ _ FileEditTime; $ This-> NextUnixTimePoke =$ _ IsTimeOut; $ This-> CurrentUnixTimePoke = time (); $ This-> UnixNowToNext = $ this-> NextUnixTimePoke-time (); $ This-> LastTimePoke = date ("Y-m-d H: I: s", $ _ FileEditTime ); $ This-> NextTimePoke = date ("Y-m-d H: I: s", $ _ IsTimeOut ); $ This-> CurrentTimePoke = date ("Y-m-d H: I: s", time ()); $ _ TxtInformation = "Last cache timestamp: $ this-> LastUnixTimePoke "; $ _ TxtInformation. = "current cache timestamp: $ this-> CurrentUnixTimePoke "; $ _ TxtInformation. = "Next cache timestamp: $ this-> NextUnixTimePoke "; $ _ TxtInformation. = "Last cache Time: $ this-> LastTimePoke "; $ _ TxtInformation. = "current cache Time: $ this-> CurrentTimePoke "; $ _ TxtInformation. = "Next cache Time: $ this-> NextTimePoke "; $ _ TxtInformation. = "distance from the next cache timestamp: $ this-> UnixNowToNext "; $ Handl = @ fopen ($ this-> CacheConfigFile, 'w '); If ($ handl) { @ Fwrite ($ handl, $ _ TxtInformation ); @ Fclose ($ handl ); } If ($ _ IsTimeOut> = time ()) { $ This-> GetCacheData (); } } Private function implements achefile () { @ Unlink ($ this-> CacheFileUrl ); @ Unlink ($ this-> CacheConfigFile ); } Public function PutCache () { $ This-> DataLength = ob_get_length (); $ PutData = ob_get_contents (); If (! File_exists ($ this-> CacheFileUrl )) { $ CreateOK = $ this-> CreateCache (); If (! $ CreateOK) { $ This-> ErrResponse ('errors occurred during cache file check, cache file creation failed '); Return false; } } Else { $ Hanld = @ fopen ($ this-> CacheFileUrl, "w "); If ($ hanld) { If (@ is_writable ($ this-> CacheFileUrl )) { @ Flock ($ hanld, LOCK_EX ); $ _ PutData = @ fwrite ($ hanld, $ PutData ); @ Flock ($ hanld, LOCK_UN ); If (! $ _ PutData) { $ This-> ErrResponse ('unable to change the content of the current cached file '); Return false; } Else { @ Fclose ($ hanld ); Return true; } } Else { $ This-> ErrResponse ('writable cached files '); Return false; } } Else { $ This-> ErrResponse ('fatal error occurred when opening the cached file '); Return false; } } } Public function GetCacheData () { $ Hanld = @ fopen ($ this-> CacheFileUrl, "r "); If ($ hanld) { If (@ is_readable ($ this-> CacheFileUrl )) { $ This-> CacheToPage = @ file_get_contents ($ this-> CacheFileUrl ); $ IsEmpty = count (file ($ this-> CacheFileUrl); // determines whether the cached file is empty. If ($ IsEmpty> 0) { Echo $ this-> CacheToPage; @ Fclose ($ hanld ); Ob_end_flush (); Exit (); } } Else { $ This-> ErrResponse ('failed to read cached file content '); Return false; } } Else { $ This-> ErrResponse ('failed to open the cache file '); Return false; } } Private function ErrResponse ($ Msg) { Echo $ Msg; } } ?>