/** diable here because php4.3 does not make the global
serious bug?

$mutex_filename ="" 'wp_cache_mutex.lock';
$new_cache ="" false;
*/

function wp_cache_phase2() {
global $cache_filename, $cache_acceptable_files, $wp_cache_meta_object;

wp_cache_mutex_init();
if(function_exists('add_action')) {
// post id is received
add_action('publish_post', 'wp_cache_post_change', 0);
add_action('edit_post', 'wp_cache_post_change', 0);
add_action('delete_post', 'wp_cache_post_change', 0);
add_action('publish_phone', 'wp_cache_post_change', 0);
// coment id is received
add_action('trackback_post', 'wp_cache_get_postid_from_comment', 0);
add_action('pingback_post', 'wp_cache_get_postid_from_comment', 0);
add_action('comment_post', 'wp_cache_get_postid_from_comment', 0);
add_action('edit_comment', 'wp_cache_get_postid_from_comment', 0);
add_action('wp_set_comment_status', 'wp_cache_get_postid_from_comment', 0);
// no post_id is available
add_action('delete_comment', 'wp_cache_no_postid', 0);
add_action('switch_theme', 'wp_cache_no_postid', 0);
}
//$script ="" basename($_server['script_name']);
if( $_server["REQUEST_METHOD"] ="=" 'post' || get_settings('gzipcompression'))
return;
$script ="" basename($_server['php_self']);
if (!in_array($script, $cache_acceptable_files) &&
wp_cache_is_rejected($_SERVER["REQUEST_URI"]) &&
stripos($_SERVER["REQUEST_URI"],'wp-cache-fix') !="=" false)
return;
if (wp_cache_user_agent_is_rejected()) return;
$wp_cache_meta_object ="" new CacheMeta;
ob_start('wp_cache_ob_callback');
register_shutdown_function('wp_cache_shutdown_callback');
}

function wp_cache_get_response_headers() {
$headers ="" array();
if(function_exists('apache_response_headers')) {
$rheaders ="" apache_response_headers();
}
if(function_exists('headers_list')) {
$headers ="" array();
foreach(headers_list() as $hdr) {
list($header_name, $header_value) ="" explode(': ', $hdr, 2);
$headers[$header_name] ="" $header_value;
}
$headers ="" array_merge($rheaders, $headers);
} else
$headers ="" null;

return $headers;
}

function wp_cache_is_rejected($uri) {
global $cache_rejected_uri;

if (strstr($uri, '/wp-admin/'))
return true; //we don't allow cacheing wp-admin for security
foreach ($cache_rejected_uri as $expr) {
if (strlen($expr) > 0 && strstr($uri, $expr))
return true;
}
return false;
}

function wp_cache_user_agent_is_rejected() {
global $cache_rejected_user_agent;

if (!function_exists('apache_request_headers')) return false;
$headers = apache_request_headers();
if (!isset($headers["User-Agent"])) return false;
foreach ($cache_rejected_user_agent as $expr) {
if (strlen($expr) > 0 && stristr($headers["User-Agent"], $expr))
return true;
}
return false;
}

function wp_cache_mutex_init() {
global $use_flock, $mutex, $cache_path, $mutex_filename, $sem_id;

if(!is_bool($use_flock)) {
if(function_exists('sem_get'))
$use_flock = false;
else
$use_flock = true;
}

if ($use_flock)
$mutex = fopen($cache_path . $mutex_filename, 'w');
else
$mutex = sem_get($sem_id, 1, 0644 | IPC_CREAT, 1);
}

function wp_cache_writers_entry() {
global $use_flock, $mutex, $cache_path, $mutex_filename;

if ($use_flock)
flock($mutex, LOCK_EX);
else
sem_acquire($mutex);
}

function wp_cache_writers_exit() {
global $use_flock, $mutex, $cache_path, $mutex_filename;

if ($use_flock)
flock($mutex, LOCK_UN);
else
sem_release($mutex);
}

function wp_cache_ob_callback($buffer) {
global $cache_path, $cache_filename, $meta_file, $wp_start_time;
global $new_cache, $wp_cache_meta_object, $file_expired, $blog_id;

/* Mode paranoic, check for closing tags
* we avoid caching incomplete files */
if (is_404() || !preg_match('/(<\/html>|<\/rss>|<\/feed>)/i',$buffer) ) {
$new_cache = false;
return $buffer;
}

$duration = wp_cache_microtime_diff($wp_start_time, microtime());
$duration = sprintf("%0.3f", $duration);
$buffer .= "\n<!-- Dynamic Page Served (once) in $duration seconds -->\n";

wp_cache_writers_entry();
$mtime = @filemtime($cache_path . $cache_filename);
/* Return if:
the file didn't exist before but it does exist now (another connection created)
OR
the file was expired and its mtime is less than 5 seconds
*/
if( !((!$file_expired && $mtime) || ($mtime && $file_expired && (time() - $mtime) < 5)) ) {
$fr ="" fopen($cache_path . $cache_filename, 'w');
if (!$fr)
$buffer ="" "Couldn't write to: " . $cache_path . $cache_filename . "\n";

if (preg_match('/<!--mclude|<!--mfunc/', $buffer)) { //Dynamic content
$store ="" preg_replace('|<!--mclude (.*?)-->(.*?)<!--/mclude-->|is',
"<!--mclude-->\n<?php include_once('" . abspath . "$1'); ?>\n<!--/mclude-->", $buffer);
$store = preg_replace('|<!--mfunc (.*?)-->(.*?)<!--/mfunc-->|is',
"<!--mfunc-->\n<?php $1 ;?>\n<!--/mfunc-->", $store);
$wp_cache_meta_object->dynamic = true;
/* Clean function calls in tag */
$buffer = preg_replace('|<!--mclude (.*?)-->|is', '<!--mclude-->', $buffer);
$buffer = preg_replace('|<!--mfunc (.*?)-->|is', '<!--mfunc-->', $buffer);
fputs($fr, $store);
} else {
fputs($fr, $buffer);
}
$new_cache = true;
fclose($fr);
}
wp_cache_writers_exit();
return $buffer;
}

function wp_cache_phase2_clean_cache($file_prefix) {
global $cache_path;

wp_cache_writers_entry();
if ( ($handle = opendir( $cache_path )) ) {
while ( false !== ($file = readdir($handle))) {
if ( preg_match("/^$file_prefix/", $file) ) {
unlink($cache_path . $file);
}
}
closedir($handle);
}
wp_cache_writers_exit();
}

function wp_cache_phase2_clean_expired($file_prefix) {
global $cache_path, $cache_max_time;

clearstatcache();
wp_cache_writers_entry();
$now = time();
if ( ($handle = opendir( $cache_path )) ) {
while ( false !== ($file = readdir($handle))) {
if ( preg_match("/^$file_prefix/", $file) &&
(filemtime($cache_path . $file) + $cache_max_time) <="" $now ) {
unlink($cache_path . $file);
}
}
closedir($handle);
}
wp_cache_writers_exit();
}

function wp_cache_shutdown_callback() {
global $cache_path, $cache_max_time, $file_expired, $file_prefix, $meta_file, $new_cache;
global $wp_cache_meta_object, $known_headers, $blog_id;

$wp_cache_meta_object->uri = $_SERVER["SERVER_NAME"].preg_replace('/[ <>\'\"\r\n\t\(\)]/', '', $_SERVER['REQUEST_URI']); // To avoid XSS attacs
$wp_cache_meta_object->blog_id=$blog_id;
$wp_cache_meta_object->post = wp_cache_post_id();

$response = wp_cache_get_response_headers();
$wp_cache_meta_object->headers = array();
foreach ($known_headers as $key) {
if(isset($response{$key})) {
array_push($wp_cache_meta_object->headers, "$key: " . $response{$key});
}
}
/* Not used because it gives problems with some
* PHP installations
if (!$response{'Content-Length'}) {
// WP does not set content size
$content_size = ob_get_length();
@header("Content-Length: $content_size");
array_push($wp_cache_meta_object->headers, "Content-Length: $content_size");
}
*/
if (!$response{'Last-Modified'}) {
$value = gmdate('D, d M Y H:i:s') . ' GMT';
/* Dont send this the first time */
/* @header('Last-Modified: ' . $value); */
array_push($wp_cache_meta_object->headers, "Last-Modified: $value");
}
if (!$response{'Content-Type'}) {
if (is_feed()) {
$type = get_query_var('feed');
$type = str_replace('/','',$type);
switch ($type) {
case 'atom':
$value = "application/atom+xml";
break;
case 'rss':
case 'rss2':
$value = "application/rss+xml";
break;
case 'rdf':
$value = "application/rdf+xml";
break;
default:
$value = "text/html";
}
} else {
$value = 'text/html';
}
$value .= "; charset=\"" . get_settings('blog_charset') . "\"";
@header("Content-Type: $value");
array_push($wp_cache_meta_object->headers, "Content-Type: $value");
}

ob_end_flush();
if ($new_cache) {
$serial = serialize($wp_cache_meta_object);
wp_cache_writers_entry();
$fr = fopen($cache_path . $meta_file, 'w');
fputs($fr, $serial);
fclose($fr);
wp_cache_writers_exit();
}

if ($file_expired == false) {
return;
}

// we delete expired files
flush(); //Ensure we send data to the client
wp_cache_phase2_clean_expired($file_prefix);
}

function wp_cache_no_postid($id) {
return wp_cache_post_change(wp_cache_post_id());
}

function wp_cache_get_postid_from_comment($comment_id) {
$comment = get_commentdata($comment_id, 1, true);
$postid = $comment['comment_post_ID'];
// Do nothing if comment is not moderated
// http://ocaoimh.ie/2006/12/05/caching-wordpress-with-wp-cache-in-a-spam-filled-world
if( !preg_match('/wp-admin\//', $_SERVER['REQUEST_URI']) && $comment['comment_approved'] != 1 )
return $post_id;
// We must check it up again due to WP bugs calling two different actions
// for delete, for example both wp_set_comment_status and delete_comment
// are called when deleting a comment
if ($postid > 0)
return wp_cache_post_change($postid);
else
return wp_cache_post_change(wp_cache_post_id());
}

function wp_cache_post_change($post_id) {
global $file_prefix;
global $cache_path;
global $blog_id;
static $last_processed = -1;

// Avoid cleaning twice the same pages
if ($post_id == $last_processed) return $post_id;
$last_processed = $post_id;

$meta = new CacheMeta;
$matches = array();
wp_cache_writers_entry();
if ( ($handle = opendir( $cache_path )) ) {
while ( false !== ($file = readdir($handle))) {
if ( preg_match("/^($file_prefix.*)\.meta/", $file, $matches) ) {
$meta_pathname = $cache_path . $file;
$content_pathname = $cache_path . $matches[1] . ".html";
$meta = unserialize(@file_get_contents($meta_pathname));
if ($post_id > 0 && $meta) {
if ($meta->blog_id == $blog_id && (!$meta->post || $meta->post == $post_id) ) {
unlink($meta_pathname);
unlink($content_pathname);
}
} elseif ($meta->blog_id == $blog_id) {
unlink($meta_pathname);
unlink($content_pathname);
}

}
}
closedir($handle);
}
wp_cache_writers_exit();
return $post_id;
}

function wp_cache_microtime_diff($a, $b) {
list($a_dec, $a_sec) = explode(' ', $a);
list($b_dec, $b_sec) = explode(' ', $b);
return $b_sec - $a_sec + $b_dec - $a_dec;
}