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<?php
/*
$Id: cache.php $
$Loc: /catalog/includes/functions/ $
$Mod: Categories Accordion Box 1.1 20120304 Kymation $
osCommerce, Open Source E-Commerce Solutions
http://www.oscommerce.com
Copyright (c) 2006 osCommerce
Released under the GNU General Public License
*/
////
//! Write out serialized data.
// write_cache uses serialize() to store $var in $filename.
// $var - The variable to be written out.
// $filename - The name of the file to write to.
function write_cache(&$var, $filename) {
$filename = DIR_FS_CACHE . $filename;
$success = false;
// try to open the file
if ($fp = @fopen($filename, 'w')) {
// obtain a file lock to stop corruptions occuring
flock($fp, 2); // LOCK_EX
// write serialized data
fputs($fp, serialize($var));
// release the file lock
flock($fp, 3); // LOCK_UN
fclose($fp);
$success = true;
}
return $success;
}
////
//! Read in seralized data.
// read_cache reads the serialized data in $filename and
// fills $var using unserialize().
// $var - The variable to be filled.
// $filename - The name of the file to read.
function read_cache(&$var, $filename, $auto_expire = false){
$filename = DIR_FS_CACHE . $filename;
$success = false;
if (($auto_expire == true) && file_exists($filename)) {
$now = time();
$filetime = filemtime($filename);
$difference = $now - $filetime;
if ($difference >= $auto_expire) {
return false;
}
}
// try to open file
if ($fp = @fopen($filename, 'r')) {
// read in serialized data
$szdata = fread($fp, filesize($filename));
fclose($fp);
// unserialze the data
$var = unserialize($szdata);
$success = true;
}
return $success;
}
////
//! Get data from the cache or the database.
// get_db_cache checks the cache for cached SQL data in $filename
// or retreives it from the database is the cache is not present.
// $SQL - The SQL query to exectue if needed.
// $filename - The name of the cache file.
// $var - The variable to be filled.
// $refresh - Optional. If true, do not read from the cache.
function get_db_cache($sql, &$var, $filename, $refresh = false){
$var = array();
// check for the refresh flag and try to the data
if (($refresh == true)|| !read_cache($var, $filename)) {
// Didn' get cache so go to the database.
// $conn = mysql_connect("localhost", "apachecon", "apachecon");
$res = tep_db_query($sql);
// if ($err = mysql_error()) trigger_error($err, E_USER_ERROR);
// loop through the results and add them to an array
while ($rec = tep_db_fetch_array($res)) {
$var[] = $rec;
}
// write the data to the file
write_cache($var, $filename);
}
}
////
//! Cache the categories box
// Cache the categories box
function tep_cache_categories_box($auto_expire = false, $refresh = false) {
global $cPath, $language;
$cache_output = '';
if (($refresh == true) || !read_cache($cache_output, 'categories_box-' . $language . '.cache' . $cPath, $auto_expire)) {
if (!class_exists('bm_categories')) {
include(DIR_WS_MODULES . 'boxes/bm_categories.php');
}
$bm_categories = new bm_categories();
$cache_output = $bm_categories->getData();
write_cache($cache_output, 'categories_box-' . $language . '.cache' . $cPath);
}
return $cache_output;
}
////
//! Cache the manufacturers box
// Cache the manufacturers box
function tep_cache_manufacturers_box($auto_expire = false, $refresh = false) {
global $HTTP_GET_VARS, $language;
$cache_output = '';
$manufacturers_id = '';
if (isset($HTTP_GET_VARS['manufacturers_id']) && is_numeric($HTTP_GET_VARS['manufacturers_id'])) {
$manufacturers_id = $HTTP_GET_VARS['manufacturers_id'];
}
if (($refresh == true) || !read_cache($cache_output, 'manufacturers_box-' . $language . '.cache' . $manufacturers_id, $auto_expire)) {
if (!class_exists('bm_manufacturers')) {
include(DIR_WS_MODULES . 'boxes/bm_manufacturers.php');
}
$bm_manufacturers = new bm_manufacturers();
$cache_output = $bm_manufacturers->getData();
write_cache($cache_output, 'manufacturers_box-' . $language . '.cache' . $manufacturers_id);
}
return $cache_output;
}
////
//! Cache the also purchased module
// Cache the also purchased module
function tep_cache_also_purchased($auto_expire = false, $refresh = false) {
global $HTTP_GET_VARS, $language, $languages_id;
$cache_output = '';
if (isset($HTTP_GET_VARS['products_id']) && is_numeric($HTTP_GET_VARS['products_id'])) {
if (($refresh == true) || !read_cache($cache_output, 'also_purchased-' . $language . '.cache' . $HTTP_GET_VARS['products_id'], $auto_expire)) {
ob_start();
include(DIR_WS_MODULES . FILENAME_ALSO_PURCHASED_PRODUCTS);
$cache_output = ob_get_contents();
ob_end_clean();
write_cache($cache_output, 'also_purchased-' . $language . '.cache' . $HTTP_GET_VARS['products_id']);
}
}
return $cache_output;
}
// Start categories accordion box
////
// Cache the categories accordion box
function tep_cache_categories_accordion_box( $auto_expire = false, $refresh = false ) {
global $cPath, $language;
$cache_output = '';
if (($refresh == true) || !read_cache($cache_output, 'categories_accordion_box-' . $language . '.cache' . $cPath, $auto_expire)) {
if (!class_exists('bm_categories_accordion')) {
include(DIR_WS_MODULES . 'boxes/bm_categories_accordion.php');
}
$bm_categories = new bm_categories_accordion();
$cache_output = $bm_categories->getData();
write_cache($cache_output, 'categories_accordion_box-' . $language . '.cache' . $cPath);
}
return $cache_output;
}
// End categories accordion box
?>