diff options
Diffstat (limited to 'system/database/DB_cache.php')
-rw-r--r-- | system/database/DB_cache.php | 386 |
1 files changed, 193 insertions, 193 deletions
diff --git a/system/database/DB_cache.php b/system/database/DB_cache.php index 53425d1d9..33f408fb4 100644 --- a/system/database/DB_cache.php +++ b/system/database/DB_cache.php @@ -1,194 +1,194 @@ -<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); -/** - * Code Igniter - * - * An open source application development framework for PHP 4.3.2 or newer - * - * @package CodeIgniter - * @author Rick Ellis - * @copyright Copyright (c) 2006, pMachine, Inc. - * @license http://www.codeignitor.com/user_guide/license.html - * @link http://www.codeigniter.com - * @since Version 1.0 - * @filesource - */ - -// ------------------------------------------------------------------------ - -/** - * Database Cache Class - * - * @category Database - * @author Rick Ellis - * @link http://www.codeigniter.com/user_guide/database/ - */ -class CI_DB_Cache { - - var $CI; - - /** - * Constructor - * - * Grabs the CI super object instance so we can access it. - * - */ - function CI_DB_Cache() - { - // Assign the main CI object to $this->CI - // and load the file helper since we use it a lot - $this->CI =& get_instance(); - $this->CI->load->helper('file'); - } - - // -------------------------------------------------------------------- - - /** - * Set Cache Directory Path - * - * @access public - * @param string the path to the cache directory - * @return bool - */ - function check_path($path = '') - { - if ($path == '') - { - if ($this->CI->db->cachedir == '') - { - return $this->CI->db->cache_off(); - } - - $path = $this->CI->db->cachedir; - } - - // Add a trailing slash to the path if needed - $path = preg_replace("/(.+?)\/*$/", "\\1/", $path); - - if ( ! is_dir($path) OR ! is_writable($path)) - { - if ($this->CI->db->db_debug) - { - return $this->CI->db->display_error('db_invalid_cache_path'); - } - - // If the path is wrong we'll turn off caching - return $this->CI->db->cache_off(); - } - - $this->CI->db->cachedir = $path; - return TRUE; - } - - // -------------------------------------------------------------------- - - /** - * Retrieve a cached query - * - * The URI being requested will become the name of the cache sub-folder. - * An MD5 hash of the SQL statement will become the cache file name - * - * @access public - * @return string - */ - function read($sql) - { - if ( ! $this->check_path()) - { - return $this->CI->db->cache_off(); - } - - $uri = ($this->CI->uri->segment(1) == FALSE) ? 'default.' : $this->CI->uri->segment(1).'+'; - $uri .= ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2); - - $filepath = $uri.'/'.md5($sql); - - if (FALSE === ($cachedata = read_file($this->CI->db->cachedir.$filepath))) - { - return FALSE; - } - - return unserialize($cachedata); - } - - // -------------------------------------------------------------------- - - /** - * Write a query to a cache file - * - * @access public - * @return bool - */ - function write($sql, $object) - { - if ( ! $this->check_path()) - { - return $this->CI->db->cache_off(); - } - - $uri = ($this->CI->uri->segment(1) == FALSE) ? 'default.' : $this->CI->uri->segment(1).'+'; - $uri .= ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2); - - $dir_path = $this->CI->db->cachedir.$uri.'/'; - - $filename = md5($sql); - - if ( ! @is_dir($dir_path)) - { - if ( ! @mkdir($dir_path, 0777)) - { - return FALSE; - } - - @chmod($dir_path, 0777); - } - - if (write_file($dir_path.$filename, serialize($object)) === FALSE) - { - return FALSE; - } - - @chmod($dir_path.$filename, 0777); - return TRUE; - } - - // -------------------------------------------------------------------- - - /** - * Delete cache files within a particular directory - * - * @access public - * @return bool - */ - function delete($segment_one = '', $segment_two = '') - { - if ($segment_one == '') - { - $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(2); - } - - if ($segment_two == '') - { - $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2); - } - - $dir_path = $this->CI->db->cachedir.$segment_one.'+'.$segment_two.'/'; - - delete_files($dir_path, TRUE); - } - - // -------------------------------------------------------------------- - - /** - * Delete all existing cache files - * - * @access public - * @return bool - */ - function delete_all() - { - delete_files($this->CI->db->cachedir, TRUE); - } - -} - +<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package CodeIgniter
+ * @author Rick Ellis
+ * @copyright Copyright (c) 2006, EllisLab, Inc.
+ * @license http://www.codeignitor.com/user_guide/license.html
+ * @link http://www.codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Database Cache Class
+ *
+ * @category Database
+ * @author Rick Ellis
+ * @link http://www.codeigniter.com/user_guide/database/
+ */
+class CI_DB_Cache {
+
+ var $CI;
+
+ /**
+ * Constructor
+ *
+ * Grabs the CI super object instance so we can access it.
+ *
+ */
+ function CI_DB_Cache()
+ {
+ // Assign the main CI object to $this->CI
+ // and load the file helper since we use it a lot
+ $this->CI =& get_instance();
+ $this->CI->load->helper('file');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set Cache Directory Path
+ *
+ * @access public
+ * @param string the path to the cache directory
+ * @return bool
+ */
+ function check_path($path = '')
+ {
+ if ($path == '')
+ {
+ if ($this->CI->db->cachedir == '')
+ {
+ return $this->CI->db->cache_off();
+ }
+
+ $path = $this->CI->db->cachedir;
+ }
+
+ // Add a trailing slash to the path if needed
+ $path = preg_replace("/(.+?)\/*$/", "\\1/", $path);
+
+ if ( ! is_dir($path) OR ! is_writable($path))
+ {
+ if ($this->CI->db->db_debug)
+ {
+ return $this->CI->db->display_error('db_invalid_cache_path');
+ }
+
+ // If the path is wrong we'll turn off caching
+ return $this->CI->db->cache_off();
+ }
+
+ $this->CI->db->cachedir = $path;
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Retrieve a cached query
+ *
+ * The URI being requested will become the name of the cache sub-folder.
+ * An MD5 hash of the SQL statement will become the cache file name
+ *
+ * @access public
+ * @return string
+ */
+ function read($sql)
+ {
+ if ( ! $this->check_path())
+ {
+ return $this->CI->db->cache_off();
+ }
+
+ $uri = ($this->CI->uri->segment(1) == FALSE) ? 'default.' : $this->CI->uri->segment(1).'+';
+ $uri .= ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
+
+ $filepath = $uri.'/'.md5($sql);
+
+ if (FALSE === ($cachedata = read_file($this->CI->db->cachedir.$filepath)))
+ {
+ return FALSE;
+ }
+
+ return unserialize($cachedata);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Write a query to a cache file
+ *
+ * @access public
+ * @return bool
+ */
+ function write($sql, $object)
+ {
+ if ( ! $this->check_path())
+ {
+ return $this->CI->db->cache_off();
+ }
+
+ $uri = ($this->CI->uri->segment(1) == FALSE) ? 'default.' : $this->CI->uri->segment(1).'+';
+ $uri .= ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
+
+ $dir_path = $this->CI->db->cachedir.$uri.'/';
+
+ $filename = md5($sql);
+
+ if ( ! @is_dir($dir_path))
+ {
+ if ( ! @mkdir($dir_path, 0777))
+ {
+ return FALSE;
+ }
+
+ @chmod($dir_path, 0777);
+ }
+
+ if (write_file($dir_path.$filename, serialize($object)) === FALSE)
+ {
+ return FALSE;
+ }
+
+ @chmod($dir_path.$filename, 0777);
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete cache files within a particular directory
+ *
+ * @access public
+ * @return bool
+ */
+ function delete($segment_one = '', $segment_two = '')
+ {
+ if ($segment_one == '')
+ {
+ $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(2);
+ }
+
+ if ($segment_two == '')
+ {
+ $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
+ }
+
+ $dir_path = $this->CI->db->cachedir.$segment_one.'+'.$segment_two.'/';
+
+ delete_files($dir_path, TRUE);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete all existing cache files
+ *
+ * @access public
+ * @return bool
+ */
+ function delete_all()
+ {
+ delete_files($this->CI->db->cachedir, TRUE);
+ }
+
+}
+
?>
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