PHP Cache Class

<无详细内容> Define (' Cache_root ', DirName (__file__). ' /cache '); Cache Storage Directory Define (' Cache_time ', 1800);//cache time Unit seconds Define (' Cache_fix ', '. html '); $CacheName =md5 ($_server[' Request_uri '). Cache_fix; Cache file Name $CacheDir =cache_root. ' /'. substr ($CacheName, 0, 1);//cache file storage Directory $CACHEURL = $CacheDir. ' /'. $CacheName;//full path to the cache file Get-mode requests are cached and generally expect to see the latest results after post if ($_server[' Request_method ']== ' GET ') { If the cache file exists and does not expire, read it out. if (file_exists ($CacheName) && time ()-filemtime ($CacheName) $FP =fopen ($CacheName, ' RB '); Fpassthru ($FP); Fclose ($FP); Exit } Determines whether the folder exists, does not exist, and creates ElseIf (!file_exists ($CacheDir)) { if (!file_exists (Cache_root)) { mkdir (cache_root,0777); chmod (cache_root,0777); } mkdir ($CacheDir, 0777); chmod ($CacheDir, 0777); } callback function that calls this function automatically when the program ends function Autocache ($contents) { Global $CACHEURL; $FP =fopen ($CACHEURL, ' WB '); Fwrite ($fp, $contents); Fclose ($FP); chmod ($CACHEURL, 0777); While generating a new cache, all old caches are automatically deleted to save space and can be ignored. Deloldcache (); return $contents; } function Deloldcache () { ChDir (Cache_root); foreach (Glob ("*/*"). Cache_fix) as $file) { if (Time ()-filemtime ($file) >cache_time) unlink ($file); } } callback function Auto_cache Ob_start (' Autocache '); }else{ Delete the cache file instead of the GET request. if (file_exists ($CACHEURL)) unlink ($CACHEURL); } ?> Copy Code

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