One more cache class.

Cache class /* * Cache class Caches * Author: More rookie * Date Created: 2006-05-05 Instance Include ("cache.php"); $cache = new cache (30); $cache->cachecheck (); echo Date ("y-m-d h:i:s"); $cache->caching (); */ Class Cache { Cache Directory var $cacheRoot = "./cache/"; Cache update time seconds, 0 for no cache var $cacheLimitTime = 0; Cache file Name var $cacheFileName = ""; Cache extension var $cacheFileExt = "PHP"; /* * Constructor function * int $cacheLimitTime Cache update Time */ function Cache ($cacheLimitTime) { if (Intval ($cacheLimitTime)) $this->cachelimittime = $cacheLimitTime; $this->cachefilename = $this->getcachefilename (); Ob_start (); } /* * Check if the cache file is within the set update time * Return: If the contents of the file are returned within the update time, the reverse returns the failure */ function Cachecheck () { if (file_exists ($this->cachefilename)) { $cTime = $this->getfilecreatetime ($this->cachefilename); if ($cTime + $this->cachelimittime > Time ()) { Echo file_get_contents ($this->cachefilename); Ob_end_flush (); Exit } } return false; } /* * Cache files or output static * String $staticFileName static file name (with relative path) */ function caching ($staticFileName = "") { if ($this->cachefilename) { $cacheContent = Ob_get_contents (); Echo $cacheContent; Ob_end_flush (); if ($staticFileName) { $this->savefile ($staticFileName, $cacheContent); } if ($this->cachelimittime) $this->savefile ($this->cachefilename, $cacheContent); } } /* * Clear Cache files * String $fileName Specify file name (with function) or all (all) * Return: Clear successful return true, reverse return false */ function ClearCache ($fileName = "All") { if ($fileName! = "All") { $fileName = $this->cacheroot. Strtoupper (MD5 ($fileName)). ".". $this->cachefileext; if (file_exists ($fileName)) { Return @unlink ($fileName); }else return false; } if (Is_dir ($this->cacheroot)) { if ($dir = @opendir ($this->cacheroot)) { while ($file = @readdir ($dir)) { $check = Is_dir ($file); if (! $check) @unlink ($this->cacheroot. $file); } @closedir ($dir); return true; }else{ return false; } }else{ return false; } } /* * Generate cache file names based on current dynamic files */ function Getcachefilename () { Return $this->cacheroot. Strtoupper (MD5 ($_server["Request_uri")). ".". $this->cachefileext; } /* * Cache file Settling time * String $fileName Cache file name (with relative path) * Return: File generation time in seconds, file does not exist return 0 */ function Getfilecreatetime ($fileName) { if (! Trim ($fileName)) return 0; if (file_exists ($fileName)) { Return Intval (Filemtime ($fileName)); }else return 0; } /* * Save File * String $fileName file name (with relative path) * String $text file contents * Return: Successfully returned ture, failed return false */ function SaveFile ($fileName, $text) { if (! $fileName | |! $text) return false; if ($this->makedir (dirname ($fileName))) { if ($fp = fopen ($fileName, "w")) { if (@fwrite ($FP, $text)) { Fclose ($FP); return true; }else { Fclose ($FP); return false; } } } return false; } /* * Continuous construction of the catalogue * String $dir directory string * INT $mode Permission number * Return: Successfully created or all built returns True, other methods return False */ function MakeDir ($dir, $mode = "0777") { if (! $dir) return 0; $dir = str_replace ("\ \", "/", $dir); $mdir = ""; foreach (Explode ("/", $dir) as $val) { $mdir. = $val. " /"; if ($val = = ":" | | $val = = "." | | Trim ($val) = = "") continue; if (! file_exists ($mdir)) { if (! @mkdir ($mdir, $mode)) { return false; } } } return true; } } ?> Copy Code

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