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<?php
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////////////////////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2006 Phorum Development Team //
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// http://www.phorum.org //
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// //
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// This program is free software. You can redistribute it and/or modify //
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// it under the terms of either the current Phorum License (viewable at //
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// phorum.org) or the Phorum License that was distributed with this file //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY, without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. //
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// //
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// You should have received a copy of the Phorum License //
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// along with this program. //
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////////////////////////////////////////////////////////////////////////////////
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// Check if the cache directory is available and if
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// files and directories can be created in it. Also
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// do a basic check on Phorums caching API.
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$phorum_check = "Phorum cache";
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function phorum_check_cache(){
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$PHORUM = $GLOBALS["PHORUM"];
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$dir = $PHORUM["cache"];
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// Some general solution descriptions.
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$solution_1 = "Change the Cache Directory setting under
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General Settings.";
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$solution_2 = "Change the Cache Directory setting under General
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Settings or give your webserver more permissions
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for the current cache directory.";
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// Check if the cache directory exists.
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if (! file_exists($dir) || ! is_dir($dir)) return array(
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PHORUM_SANITY_CRIT,
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"The system is unable to find the cache
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directory \"".htmlspecialchars($dir)."\" on
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your system.",
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$solution_1
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);
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// Check if we can create files in the cache directory.
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$fp = @fopen ("$dir/sanity_check_dummy_file", "w");
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if (! $fp) return array (
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PHORUM_SANITY_CRIT,
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"The system is unable to write files
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to your cache directory \"".htmlspecialchars($dir)."\".
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The system error was:<br/><br/>".
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htmlspecialchars($php_errormsg).".",
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$solution_2
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);
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fclose($fp);
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// Some very unusual thing might happen. On Windows2000 we have seen
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// that the webserver can write a message to the cache directory,
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// but that it cannot read it afterwards. Probably due to
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// specific NTFS file permission settings. So here we have to make
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// sure that we can open the file that we just wrote.
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$checkfp = fopen("$dir/sanity_check_dummy_file", "r");
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if (! $checkfp) return array(
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PHORUM_SANITY_CRIT,
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"The system was able to write a file to your cache directory
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\"".htmlspecialchars($dir)."\", but afterwards the created
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file could not be read by the webserver. This is probably
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caused by the file permissions on your cache directory.",
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$solution_2
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);
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unlink("$dir/sanity_check_dummy_file");
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// Check if we can create directories in the cache directory.
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if (! @mkdir("$dir/sanity_check_dummy_dir")) return array(
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PHORUM_SANITY_CRIT,
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"The system is unable to create directories
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in your cache directory \"".htmlspecialchars($dir)."\".
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The system error was:<br/><br/>".htmlspecialchars($php_errormsg).".",
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$solution_2
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);
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rmdir("$dir/sanity_check_dummy_dir");
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// All seems OK. Do a final system check where we check
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// the caching system like the Phorum system will do.
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phorum_cache_put('sanity_checks', 'dummy', 'dummy');
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$entry = phorum_cache_get('sanity_checks', 'dummy');
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phorum_cache_remove('sanity_checks', 'dummy');
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if ($entry != 'dummy') return array(
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PHORUM_SANITY_WARN,
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"There might be a problem in Phorum's caching system.
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Storing and retrieving a dummy key failed. If you
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experience problems with your Phorum installation,
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it might me because of this.",
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"As a work around, you can disable the caching facilities
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in the admin interface. Please contact the Phorum
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developers to find out what the problem is.",
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);
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return array (PHORUM_SANITY_OK, NULL);
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}
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?>
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