]> git.mxchange.org Git - mailer.git/blobdiff - inc/classes/cachesystem.class.php
Introduced some wrapper functions, the extension for cache files is now .cache.php...
[mailer.git] / inc / classes / cachesystem.class.php
index 2d02b62a215d1237d890f16dd0966ff7125f9113..a5ea7261d17157cb62921364226888ab37f7c4fe 100644 (file)
  * $Date::                                                            $ *
  * $Tag:: 0.2.1-FINAL                                                 $ *
  * $Author::                                                          $ *
- * Needs to be in all Files and every File needs "svn propset           *
- * svn:keywords Date Revision" (autoprobset!) at least!!!!!!            *
  * -------------------------------------------------------------------- *
  * Copyright (c) 2003 - 2009 by Roland Haeder                           *
- * For more information visit: http://www.mxchange.org                  *
+ * Copyright (c) 2009 - 2013 by Mailer Developer Team                   *
+ * For more information visit: http://mxchange.org                      *
  *                                                                      *
  * This program is free software; you can redistribute it and/or modify *
  * it under the terms of the GNU General Public License as published by *
@@ -43,35 +42,51 @@ if (!defined('__SECURITY')) {
 
 // Caching class
 class CacheSystem {
-       // Define variables
-       var $ret = 'init';
+       // Status code
+       var $statusCode = 'init';
+
+       // Full-qualified filename
        var $fqfn = '';
-       var $pointer = false;
+
+       // Resource to cache file
+       var $pointer = FALSE;
+
+       // Data array from cache
        var $data = array();
+
+       // Version data from cache
        var $version = array();
+
+       // Cache name
        var $name = '';
        var $rebuilt = array();
-       var $extension = '.cache';
-       var $statusDone = 'done';
+
+       // File extension
+       var $extension = '';
        var $status = array();
        var $readable = array();
+       var $fullPath = '';
 
        // Constructor
        function CacheSystem () {
-               // Failed is the default
-               $this->ret = 'failed';
+               // Set extension
+               $this->extension = getCacheExtension();
+
+               // Construct full path
+               $this->fullPath = getPath() . getCachePath();
 
-               // Remeber path
+               // Failed is the default
+               $this->setStatusCode('failed');
 
                // Check if path exists
-               if (isDirectory(getConfig('CACHE_PATH'))) {
+               if (isDirectory($this->fullPath)) {
                        // Is there a .htaccess file?
-                       if (isFileReadable(getConfig('CACHE_PATH') . '.htaccess')) {
+                       if (isFileReadable($this->fullPath . '.htaccess')) {
                                // All done!
-                               $this->ret = $this->statusDone;
+                               $this->setStatusCode('done');
                        } else {
                                // Stop! Set a .htaccess file first
-                               $this->ret = 'htaccess';
+                               $this->setStatusCode('htaccess');
                        }
                } // END - if
        }
@@ -82,17 +97,17 @@ class CacheSystem {
                $this->name = $cacheName;
 
                // Construct FQFN (full qualified file name)
-               $this->fqfn = getConfig('CACHE_PATH') . $cacheName . $this->extension;
+               $this->fqfn = $this->fullPath . $cacheName . $this->extension;
 
                // Check if file exists and if version matches
                if (!isset($this->status[$cacheName])) {
                        // Pre-fetch cache here if found
                        if ($this->isCacheReadable()) $this->getArrayFromCache();
 
-                       //* DEBUG: */ print($cacheName.'='.intval($this->isCacheReadable()).'/'.intval(is_writeable($this->fqfn)).'/'.intval($this->extensionVersionMatches('cache')).'<br />');
+                       //* DEBUG: */ debugOutput('cacheName='.$cacheName.',isCacheReadable='.intval($this->isCacheReadable()).',is_writeable='.intval(is_writeable($this->fqfn)).',extensionMatches='.intval($this->extensionVersionMatches('cache')));
                        $this->status[$cacheName] = ($this->isCacheReadable() && (is_writeable($this->fqfn)) && ($this->extensionVersionMatches('cache')));
                } // END - if
-               //* DEBUG: */ print($cacheName.'='.intval($this->status[$cacheName]).'<br />');
+               //* DEBUG: */ debugOutput('cacheName='.$cacheName.',status='.intval($this->status[$cacheName]));
 
                // Return status
                return $this->status[$cacheName];
@@ -101,19 +116,35 @@ class CacheSystem {
        // Initializes the cache file
        function init () {
                // This will destory an existing cache file!
-               if ($this->ret == $this->statusDone) {
+               if ($this->getStatusCode() == 'done') {
                        // Reset read status
                        $this->resetCacheReadStatus();
 
                        // Create file
                        if ($this->isCacheReadable()) changeMode($this->fqfn, 0666);
-                       $this->pointer = fopen($this->fqfn, 'w') or app_die(__METHOD__, __LINE__, "Cannot write to cache ".$this->fqfn." !");
+                       $this->pointer = fopen($this->fqfn, 'w') or reportBug(__METHOD__, __LINE__, 'Cannot write to cache ' . $this->fqfn . ' !');
 
                        // Add open PHP tag
-                       fwrite($this->pointer, "<?php\n");
+                       $this->writeLine('<?php');
                } else {
                        // Cannot create file
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
+                       reportBug(__METHOD__, __LINE__, 'Problems with cache directory detected, getStatusCode()=' . $this->getStatusCode());
+               }
+       }
+
+       /**
+        * Writes a line to the pointer and adds a \n (new-line) to the end
+        *
+        * @access private
+        */
+       function writeLine ($line) {
+               // Is the pointer a valid resource?
+               if (is_resource($this->pointer)) {
+                       // Write the line
+                       fwrite($this->pointer, $line . PHP_EOL);
+               } else {
+                       // Something bad happened
+                       reportBug(__METHOD__, __LINE__, 'Pointer type is ' . gettype($this->pointer) . ', expected is resource.');
                }
        }
 
@@ -124,6 +155,7 @@ class CacheSystem {
                unset($this->status[$this->name]);
        }
 
+       // Adds a data row (array) to cache file and global cache array
        function addRow ($data) {
                // Is the pointe rvalid?
                if (is_resource($this->pointer)) {
@@ -137,38 +169,38 @@ class CacheSystem {
                                                $GLOBALS['cache_array']['extension'][$k][$data['ext_name']] = $v;
                                        }
                                        if (($k == 'ext_keep') && ($v == 'Y')) {
-                                               $GLOBALS['cache_array']['active_extensions'][$data['ext_name']] = $v;
+                                               $GLOBALS['cache_array']['always_active'][$data['ext_name']] = $v;
                                        } // END - if
-                               } elseif (is_array($v)) {
-                                       // Serialize and BASE64-encode the array
-                                       $v = base64_encode(serialize($v));
                                } elseif ($this->name == 'config') {
                                        // Configuration
                                        $GLOBALS['cache_array']['config'][$data['config']][$k] = $v;
                                } elseif ($this->name == 'filter') {
                                        // Filter
-                                       $GLOBALS['cache_array']['filter']['chains'][$data['filter_name']][$data['filter_function']] = $data['filter_active'];
+                                       $GLOBALS['cache_array']['filter']['chains'][$data['filter_name']][$data['filter_function']]  = $data['filter_active'];
                                        $GLOBALS['cache_array']['filter']['counter'][$data['filter_name']][$data['filter_function']] = $data['filter_counter'];
-                                       $GLOBALS['cache_array']['filter']['loaded'][$data['filter_name']][$data['filter_function']] = true;
+                                       $GLOBALS['cache_array']['filter']['loaded'][$data['filter_name']][$data['filter_function']]  = TRUE;
                                } elseif ($this->name == 'modules') {
                                        // Modules
                                        $GLOBALS['cache_array']['modules'][$k][$data['module']] = $v;
                                } elseif ($this->name == 'admin') {
-                                       // Modules
-                                       if ($k == 'login') {
-                                               $GLOBALS['cache_array']['admin'][$k][$data['admin_id']] = $v;
-                                       } else {
+                                       // Admin logins
+                                       if ($k == 'admin_id') {
                                                $GLOBALS['cache_array']['admin'][$k][$data['login']] = $v;
+                                       } else {
+                                               $GLOBALS['cache_array']['admin'][$k][$data['admin_id']] = $v;
                                        }
+                               } elseif ($this->name == 'admin_acls') {
+                                       // Access control lines
+                                       array_push($GLOBALS['cache_array']['admin_acls'][$k][$data['admin_id']], $v);
                                } elseif ($this->name == 'refdepths') {
-                                       // Referal levels
+                                       // Referral levels
                                        $GLOBALS['cache_array']['refdepths'][$k][$data['id']] = $v;
                                } elseif ($this->name == 'refsystem') {
-                                       // Referal system
+                                       // Referral system
                                        $GLOBALS['cache_array']['refsystem'][$k][$data['id']] = $v;
                                } elseif ($this->name == 'revision') {
                                        // Revision data
-                                       $GLOBALS['cache_array']['revision'][$k] = $v;
+                                       $GLOBALS['cache_array']['revision'][$k][0] = $v;
                                } elseif ($this->name == 'themes') {
                                        // Themes
                                        if ($k == 'theme_path') {
@@ -176,26 +208,42 @@ class CacheSystem {
                                        } else {
                                                $GLOBALS['cache_array']['themes'][$k][$data['theme_path']] = $v;
                                        }
+                               } elseif ($this->name == 'imprint') {
+                                       // Imprint
+                                       $GLOBALS['cache_array']['imprint'][$k][$data['imprint_id']] = $v;
+                               } elseif ($this->name == 'points_data') {
+                                       // Table 'points_data'
+                                       $GLOBALS['cache_array']['points_data'][$k][$data['id']] = $v;
+                               } elseif ($this->name == 'earning') {
+                                       // Table 'earning'
+                                       $GLOBALS['cache_array']['earning'][$k][$data['earning_id']] = $v;
+                               } elseif ($this->name == 'payments') {
+                                       // Table 'payments'
+                                       $GLOBALS['cache_array']['payments'][$k][$data['id']] = $v;
+                               } elseif (is_array($v)) {
+                                       // Serialize and BASE64-encode the array
+                                       $v = base64_encode(serialize($v));
                                } else {
                                        // Finialize the cache and close it
                                        $this->finalize();
 
                                        // Remove cache
-                                       $this->removeCacheFile(true);
+                                       $this->removeCacheFile(TRUE);
 
-                                       // Unsupported cache found!
-                                       debug_report_bug('Unsupported cache ' . $this->name . ' detected.');
+                                       // Unsupported/unhandled cache detected
+                                       reportBug(__METHOD__, __LINE__, 'Unsupported cache ' . $this->name . ' detected, data=' . print_r($data, TRUE) . ',k=' . $k . ',v=' . $v);
                                }
 
                                // Write cache line to file
-                               fwrite($this->pointer, $this->rewriteEntry($k, $v));
+                               $this->writeLine($this->rewriteEntry($k, $v));
                        } // END - foreach
                } else {
                        // Cannot create file
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
+                       reportBug(__METHOD__, __LINE__, 'Problem with cache detected, no resource! pointer[]=' . gettype($this->pointer));
                }
        }
 
+       // Closes cache file with closing PHP tag
        function finalize () {
                // Quit function when no pointer is set
                if (is_resource($this->pointer)) {
@@ -203,7 +251,7 @@ class CacheSystem {
                        $this->storeExtensionVersion('cache');
 
                        // Write footer
-                       fwrite($this->pointer, "?>\n");
+                       $this->writeLine('?>');
 
                        // Close file add destroy handler
                        fclose($this->pointer);
@@ -216,11 +264,12 @@ class CacheSystem {
 
                        // Remove pointer and status
                        unset($this->status[$this->name]);
-                       $this->pointer = false;
-                       //* DEBUG: */ outputHtml(__METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - FINALIZED!<br />");
+                       $this->pointer = FALSE;
+                       //* DEBUG: */ logDebugMessage(__METHOD__, __LINE__, 'name=' . $this->name . ' - FINALIZED!');
                } // END - if
        }
 
+       // Loads cache file and returns an array of the cached data
        function getArrayFromCache () {
                // Is the cache already loaded?
                if (isset($this->data[$this->name])) {
@@ -231,7 +280,7 @@ class CacheSystem {
                // Is the cache file there?
                if ($this->isCacheReadable()) {
                        // Load cache file
-                       require($this->fqfn);
+                       include($this->fqfn);
 
                        // Is there an array?
                        if (isset($this->data[$this->name])) {
@@ -256,8 +305,7 @@ class CacheSystem {
                        } // END - if
                } else {
                        // Cache file not found or not readable
-                       debug_report_bug($this->name);
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".sprintf(getMessage('CACHE_CANNOT_LOAD'), $this->fqfn));
+                       reportBug(__METHOD__, __LINE__, '{%message,CACHE_CANNOT_LOAD=' . $this->name . '%}');
 
                        // Try to remove it
                        $this->removeCacheFile();
@@ -268,21 +316,21 @@ class CacheSystem {
        }
 
        // Destroy an existing cache file
-       function removeCacheFile ($force = false) {
+       function removeCacheFile ($force = FALSE) {
                // Reset read status
                $this->resetCacheReadStatus();
 
                // Debug message
-               /* DEBUG: */ logDebugMessage(__METHOD__, __LINE__, sprintf("%s should be removed.", $this->name));
+               //* DEBUG: */ logDebugMessage(__METHOD__, __LINE__, sprintf('%s should be removed.', $this->name));
 
                // Is the cache file not yet rebuilt?
                if ((!isset($this->rebuilt[$this->name])) && ($this->isCacheReadable())) {
                        // Only run in regular output mode
-                       if ((getOutputMode() != 0) && ($force === false)) {
+                       if ((!isHtmlOutputMode()) && ($force === FALSE)) {
                                // Debug message if allowed
                                if (isDebugModeEnabled()) {
                                        // Debug message
-                                       logDebugMessage(__METHOD__, __LINE__, 'Not removing cache ' . $this->name . ' in output_mode=' . getOutputMode());
+                                       logDebugMessage(__METHOD__, __LINE__, 'Not removing cache ' . $this->name . ' in output_mode=' . getScriptOutputMode());
                                } // END - if
 
                                // Abort here
@@ -299,6 +347,7 @@ class CacheSystem {
                        } // END - if
 
                        // Remove cache file from system
+                       //* DEBUG: */ reportBug(__METHOD__, __LINE__, 'About to remove ' . basename($this->fqfn) . '!');
                        removeFile($this->fqfn);
 
                        // Reset read status
@@ -309,17 +358,17 @@ class CacheSystem {
                                // The cache does no longer exist so kill the content
                                unset($this->data[$this->name]);
                                unset($this->version[$this->name]);
-                               $this->rebuilt[$this->name] = true;
+                               $this->rebuilt[$this->name] = TRUE;
                        } else {
                                // Not removed!
-                               addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".sprintf(getMessage('CACHE_CANNOT_UNLINK'), $this->fqfn));
+                               reportBug(__METHOD__, __LINE__, '{%message,CACHE_CANNOT_UNLINK=' . $this->name . '%}');
                        }
                } // END - if
        }
 
        // Unused method:
        function removeEntry ($search, $data, $array) {
-               if ($this->status[$this->name] == $this->statusDone) {
+               if ($this->status[$this->name] == 'done') {
                        // Load cache into dummy array
                        $dummy = $this->getArrayFromCache();
 
@@ -340,10 +389,10 @@ class CacheSystem {
 
                                // Close cache file
                                $this->finalize();
-                       }
+                       } // END - if
                } else {
                        // Cannot write to cache!
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
+                       reportBug(__METHOD__, __LINE__, 'Problem with cache detected: Unexpected status ' . $this->status[$this->name]);
                }
        }
 
@@ -353,27 +402,27 @@ class CacheSystem {
                                if (is_array($v)) {
                                        // Multi line(s) found
                                        $LINE = '';
-                                       foreach($v as $k2 => $v2) {
+                                       foreach ($v as $k2 => $v2) {
                                                // Put every array element in a row...
                                                $LINE .= $this->rewriteEntry($k, $v2);
-                                       }
+                                       } // END - foreach
                                } else {
                                        // Single line found
                                        $LINE = $this->rewriteEntry($k, $v);
                                }
 
                                // Write line(s)
-                               fwrite($this->pointer, $LINE);
+                               $this->writeLine($LINE);
                        } // END - foreach
                } else {
                        // Cannot write array!
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
+                       reportBug(__METHOD__, __LINE__, 'Problem with cache detected: pointer is not resource! pointer[]=' . gettype($this->pointer));
                }
        }
 
        // Unused method
        function replaceEntry ($search, $replace, $search_key, $array) {
-               if ($this->status[$this->name] == $this->statusDone) {
+               if ($this->status[$this->name] == 'done') {
                        // Load cache into dummy array
                        $dummy = $this->getArrayFromCache();
 
@@ -381,7 +430,7 @@ class CacheSystem {
                        if ((is_array($dummy)) && (isset($dummy[$search])) && (is_array($dummy[$search]))) {
                                // Search for key in array
                                $key_found = array_key_exists($search_key, $dummy[$search]);
-                               if ($key_found == true) {
+                               if ($key_found == TRUE) {
                                        $key = $search_key;
                                        // Key (hopefully) found?
                                        foreach ($dummy as $a => $v) {
@@ -404,7 +453,7 @@ class CacheSystem {
                        } // END - if
                } else {
                        // Cannot write to cache!
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
+                       reportBug(__METHOD__, __LINE__, 'Problem with cache detected: Unexpected status ' . $this->status[$this->name]);
                }
        }
 
@@ -417,57 +466,65 @@ class CacheSystem {
                                // Get extension version
                                $ext_ver = getExtensionVersion($ext_name);
 
-                               // Write cache line to file
-                               fwrite($this->pointer, $this->rewriteEntry($ext_name, $ext_ver, 'version', true));
-
                                // Add the extension version to object (DO NOT REMOVE IT! Endless loop...)
                                $this->version[$this->name][$ext_name] = $ext_ver;
+
+                               // Write cache line to file
+                               $this->writeLine($this->rewriteEntry($ext_name, $ext_ver, 'version', TRUE));
                        } // END - if
-                       //* DEBUG: */ outputHtml(__METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - {$ext_name}={$ext_ver}<br />");
+                       //* DEBUG: */ logDebugMessage(__METHOD__, __LINE__, 'name=' . $this->name . ',ext_name=' . $ext_name . ',ext_ver=' . $ext_ver);
                } else {
                        // Cannot create file
-                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
+                       reportBug(__METHOD__, __LINE__, 'Problem with cache detected: pointer is not resource! pointer[]=' . gettype($this->pointer));
                }
        }
 
-       // Checks wether versions from cache and extension matches
+       // Checks whether versions from cache and extension matches
        function extensionVersionMatches ($ext_name) {
-               // Default is not matching
-               $matches = false;
-
-               // Compare only if installed
-               if (isExtensionInstalled($ext_name)) {
-                       // Get extension version
-                       $ext_ver = getExtensionVersion($ext_name);
-
-                       // Debug messages
-                       if (isset($this->version[$this->name][$ext_name])) {
-                               // Does it match?
-                               $matches = ((isset($this->version[$this->name][$ext_name])) && ($this->version[$this->name][$ext_name] == $ext_ver));
-                       } elseif ($this->isCacheReadable()) {
-                               // No cache version found!
-                               logDebugMessage(__METHOD__, __LINE__, "Cache {$this->name} has missing version entry for extension {$ext_name}! Purging cache...");
-
-                               // Remove the cache file
-                               $this->removeCacheFile(true);
+               // Check cache
+               if (!isset($GLOBALS[__METHOD__][$ext_name])) {
+                       // Does never match by default
+                       $GLOBALS[__METHOD__][$ext_name] = FALSE;
+
+                       // Compare only if installed
+                       if (isExtensionInstalled($ext_name)) {
+                               // Get extension version
+                               $ext_ver = getExtensionVersion($ext_name);
+
+                               // Debug messages
+                               if (isset($this->version[$this->name][$ext_name])) {
+                                       // Does it match?
+                                       $GLOBALS[__METHOD__][$ext_name] = ($this->version[$this->name][$ext_name] == $ext_ver);
+                               } elseif ($this->isCacheReadable()) {
+                                       // No cache version found
+                                       logDebugMessage(__METHOD__, __LINE__, 'Cache ' . $this->name . ' has missing version entry for extension ext-' . $ext_name . '! Purging cache...');
+       
+                                       // Remove the cache file
+                                       $this->removeCacheFile(TRUE);
+                               }
+                       } else {
+                               // Not installed, does always match
+                               $GLOBALS[__METHOD__][$ext_name] = TRUE;
                        }
                } else {
-                       // Not installed, does always match
-                       $matches = true;
+                       // Cache entry found, log debug message
+                       //* DEBUG: */ logDebugMessage(__METHOD__, __LINE__, 'ext_name=' . $ext_name . ', matches=' . intval($GLOBALS[__METHOD__][$ext_name]));
                }
 
                // Compare both
-               return $matches;
+               return $GLOBALS[__METHOD__][$ext_name];
        }
 
        // Rewrit the entry so it can be stored in cache file
        // @TODO Add support for more types which break in last else-block
-       function rewriteEntry ($key, $value, $prefix = 'data', $single = false) {
+       function rewriteEntry ($key, $value, $prefix = 'data', $single = FALSE) {
                // Default is not single entry
                $extender = '[]';
 
                // Add only for single array entry?
-               if ($single === true) $extender = '';
+               if ($single === TRUE) {
+                       $extender = '';
+               } // END - if
 
                // Init line
                $line = '';
@@ -475,34 +532,42 @@ class CacheSystem {
                // String or non-string? ;-)
                if (is_string($value)) {
                        // String...
-                       $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = '" . escapeQuotes($value) . "';\n";
+                       $line = '$this->' . $prefix . "['" . $this->name . "']['" . $key . "']" . $extender . " = '" . escapeQuotes($value) . "';";
                } elseif (is_null($value)) {
                        // Null
-                       $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = null;\n";
+                       $line = '$this->' . $prefix . "['" . $this->name . "']['" . $key . "']" . $extender . ' = NULL;';
                } elseif (is_bool($value)) {
                        // Boolean value
-                       if ($value === true) {
+                       if ($value === TRUE) {
                                // True
-                               $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = true;\n";
+                               $line = '$this->' . $prefix . "['" . $this->name . "']['" . $key . "']" . $extender . ' = TRUE;';
                        } else {
                                // False
-                               $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = false;\n";
+                               $line = '$this->' . $prefix . "['" . $this->name . "']['" . $key . "']" . $extender . ' = FALSE;';
                        }
+               } elseif (isset($value[0])) {
+                       // These lines needs fixing
+                       reportBug(__METHOD__, __LINE__, 'Invalid entry with [0] found. key=' . $key);
                } else {
                        // Non-string
-                       $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = " . $value . ";\n";
+                       $line = '$this->' . $prefix . "['" . $this->name . "']['" . $key . "']" . $extender . ' = ' . $value . ';';
                }
 
                // Return line
                return $line;
        }
 
-       // Getter for cache status
-       function getStatus () {
-               return $this->ret;
+       // Getter for cache status code
+       function getStatusCode () {
+               return $this->statusCode;
        }
 
-       // Checks wether the current cache file is readable
+       // Setter for cache status code
+       function setStatusCode ($status) {
+               $this->statusCode = $status;
+       }
+
+       // Checks whether the current cache file is readable
        function isCacheReadable () {
                // Array entry found?
                if (!isset($this->readable[$this->name])) {
@@ -514,6 +579,11 @@ class CacheSystem {
                return $this->readable[$this->name];
        }
 
+       // Cloning not allowed
+       function __clone () {
+               // Please do not clone this class
+               reportBug(__METHOD__, __LINE__, 'Cloning of this class is not allowed.');
+       }
 } // END - class
 
 // [EOF]