diff options
Diffstat (limited to 'phpBB/includes/acm/cache_file.php')
| -rw-r--r-- | phpBB/includes/acm/cache_file.php | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/phpBB/includes/acm/cache_file.php b/phpBB/includes/acm/cache_file.php new file mode 100644 index 0000000000..a840274e01 --- /dev/null +++ b/phpBB/includes/acm/cache_file.php @@ -0,0 +1,244 @@ +<?php +/*************************************************************************** + * cache_file.php + * ------------------- + * begin : Saturday, Feb 13, 2001 + * copyright : (C) 2001 The phpBB Group + * email : support@phpbb.com + * + * $Id$ + * + ***************************************************************************/ + +/*************************************************************************** + * + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + ***************************************************************************/ + +// +// This class is part of the Advanced Cache Manager +// + +class acm +{ + var $vars = ''; + var $vars_ts = array(); + var $modified = FALSE; + + var $sql_rowset = array(); + var $sql_rowset_index = array(); + + function acm() + { + //$this->load_cache(); + $this->cache_dir = $phpbb_root_path . 'cache/'; + } + + function tidy($expire_time = 0) + { + global $phpEx; + + $dir = opendir($this->cache_dir); + while ($entry = readdir($dir)) + { + if ($entry{0} == '.') + { + continue; + } + if (!$expire_time || time() - $expire_time >= filemtime($this->cache_dir . $entry)) + { + unlink($this->cache_dir . $entry); + } + } + if (file_exists($this->cache_dir . 'global.' . $phpEx)) + { + foreach ($this->vars_ts as $varname => $timestamp) + { + if (time() - $expire_time >= $timestamp) + { + $this->destroy($varname); + } + } + } + else + { + $this->vars = $this->vars_ts = array(); + $this->modified = TRUE; + } + } + + function save($varname, $var) + { + $this->vars[$varname] = $var; + $this->vars_ts[$varname] = time(); + $this->modified = TRUE; + } + + function destroy($varname) + { + if (isset($this->vars[$varname])) + { + $this->modified = TRUE; + unset($this->vars[$varname]); + unset($this->vars_ts[$varname]); + } + } + + function load($varname, $expire_time = 0) + { + if (!is_array($this->vars)) + { + $this->load_cache(); + } + if (isset($this->vars[$varname])) + { + if ($expire_time && time() - $this->vars_ts[$varname] > $expire_time) + { + $this->destroy($varname); + return null; + } + return $this->vars[$varname]; + } + + return null; + } + + function exists($varname, $expire_time = 0) + { + if (!is_array($this->vars)) + { + $this->load_cache(); + } + + if ($expire_time > 0) + { + if (!isset($this->vars[$varname])) + { + return FALSE; + } + if ($this->vars_ts[$varname] <= time() - $expire_time) + { + $this->destroy($varname); + return FALSE; + } + } + + return isset($this->vars[$varname]); + } + + function load_cache() + { + global $phpEx; + + $this->vars = array(); + @include($this->cache_dir . 'global.' . $phpEx); + } + + function save_cache() + { + if (!$this->modified) + { + return; + } + + global $phpEx; + $file = '<?php $this->vars=' . $this->format_array($this->vars) . ";\n\$this->vars_ts=" . $this->format_array($this->vars_ts) . ' ?>'; + + $fp = fopen($this->cache_dir . 'global.' . $phpEx, 'wb'); + fwrite($fp, $file); + fclose($fp); + } + + function format_array($array) + { + $lines = array(); + foreach ($array as $k => $v) + { + if (is_array($v)) + { + $lines[] = "'$k'=>" . $this->format_array($v); + } + elseif (is_int($v)) + { + $lines[] = "'$k'=>$v"; + } + elseif (is_bool($v)) + { + $lines[] = "'$k'=>" . (($v) ? 'TRUE' : 'FALSE'); + } + else + { + $lines[] = "'$k'=>'" . str_replace('\\\\', '\\\\\\\\', str_replace("'", "\'", $v)) . "'"; + } + } + return 'array(' . implode(',', $lines) . ')'; + } + + function sql_load($query) + { + global $db, $phpEx; + if (!file_exists($this->cache_dir . md5($query) . '.' . $phpEx)) + { + return false; + } + + include($this->cache_dir . md5($query) . '.' . $phpEx); + + $query_id = 'Cache id #' . count($this->sql_rowset); + $this->sql_rowset[$query_id] = $rowset; + $this->sql_rowset_index[$query_id] = 0; + $db->query_result = $query_id; + + return true; + } + + function sql_save($query, $result) + { + global $db, $phpEx; + $fp = fopen($this->cache_dir . md5($query) . '.' . $phpEx, 'wb'); + + $lines = array(); + $query_id = 'Cache id #' . count($this->sql_rowset); + $this->sql_rowset[$query_id] = array(); + $this->sql_rowset_index[$query_id] = 0; + $db->query_result = $query_id; + + while ($row = $db->sql_fetchrow($result)) + { + $this->sql_rowset[$query_id][] = $row; + + $line = 'array('; + foreach ($row as $key => $val) + { + $line .= "'$key'=>'" . str_replace('\\\\', '\\\\\\\\', str_replace("'", "\'", $val)) . "',"; + } + $lines[] = substr($line, 0, -1) . ')'; + } + + fwrite($fp, "<?php\n\n/*\n$query\n*/\n\n\$rowset = array(" . implode(',', $lines) . ') ?>'); + fclose($fp); + } + + function sql_exists($query_id) + { + return isset($this->sql_rowset[$query_id]); + } + + function sql_fetchrow($query_id) + { + if (!isset($this->sql_rowset[$query_id][$this->sql_rowset_index[$query_id]])) + { + return false; + } + + $row = $this->sql_rowset[$query_id][$this->sql_rowset_index[$query_id]]; + ++$this->sql_rowset_index[$query_id]; + + return $row; + } +} +?>
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