ptions">Configuration messed up?'; echo '
'; echo ''; echo '
'; wp_nonce_field('wp-cache'); echo "
\n"; echo ''; } function wp_cache_edit_max_time () { global $cache_max_time, $wp_cache_config_file, $valid_nonce; if(isset($_REQUEST['wp_max_time']) && $valid_nonce) { $max_time = (int)$_REQUEST['wp_max_time']; if ($max_time > 0) { $cache_max_time = $max_time; wp_cache_replace_line('^ *\$cache_max_time', "\$cache_max_time = $cache_max_time;", $wp_cache_config_file); } } echo '
'; echo ''; echo ""; echo '
'; wp_nonce_field('wp-cache'); echo "
\n"; } function wp_cache_sanitize_value($text, & $array) { $text = wp_specialchars(strip_tags($text)); $array = preg_split("/[\s,]+/", chop($text)); $text = var_export($array, true); $text = preg_replace('/[\s]+/', ' ', $text); return $text; } function wp_cache_edit_rejected_ua() { global $cache_rejected_user_agent, $wp_cache_config_file, $valid_nonce; if (!function_exists('apache_request_headers')) return; if(isset($_REQUEST['wp_rejected_user_agent']) && $valid_nonce) { $text = wp_cache_sanitize_value($_REQUEST['wp_rejected_user_agent'], $cache_rejected_user_agent); wp_cache_replace_line('^ *\$cache_rejected_user_agent', "\$cache_rejected_user_agent = $text;", $wp_cache_config_file); } echo '
Rejected User Agents'; echo "

Strings in the HTTP 'User Agent' header that prevent WP-Cache from caching bot, spiders, and crawlers' requests. Note that cached files are still sent to these request if they already exists.

\n"; echo '
'; echo ''; echo ' '; echo '
'; wp_nonce_field('wp-cache'); echo '
'; echo "
\n"; } function wp_cache_edit_rejected() { global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce; if(isset($_REQUEST['wp_rejected_uri']) && $valid_nonce) { $text = wp_cache_sanitize_value($_REQUEST['wp_rejected_uri'], $cache_rejected_uri); wp_cache_replace_line('^ *\$cache_rejected_uri', "\$cache_rejected_uri = $text;", $wp_cache_config_file); } echo "

Add here strings (not a filename) that forces a page not to be cached. For example, if your URLs include year and you dont want to cache last year posts, it's enough to specify the year, i.e. '/2004/'. WP-Cache will search if that string is part of the URI and if so, it will no cache that page.

\n"; echo '
'; echo ''; echo ' '; echo '
'; wp_nonce_field('wp-cache'); echo "
\n"; } function wp_cache_edit_accepted() { global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce; if(isset($_REQUEST['wp_accepted_files']) && $valid_nonce) { $text = wp_cache_sanitize_value($_REQUEST['wp_accepted_files'], $cache_acceptable_files); wp_cache_replace_line('^ *\$cache_acceptable_files', "\$cache_acceptable_files = $text;", $wp_cache_config_file); } echo "

Add here those filenames that can be cached, even if they match one of the rejected substring specified above.

\n"; echo '
'; echo ''; echo ' '; echo '
'; wp_nonce_field('wp-cache'); echo "
\n"; } function wp_cache_enable() { global $wp_cache_config_file, $cache_enabled; if(get_settings('gzipcompression')) { echo "Error: GZIP compression is enabled, disable it if you want to enable wp-cache.

"; return false; } if( wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = true;', $wp_cache_config_file) ) { $cache_enabled = true; } } function wp_cache_disable() { global $wp_cache_config_file, $cache_enabled; if (wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = false;', $wp_cache_config_file)) { $cache_enabled = false; } } function wp_cache_is_enabled() { global $wp_cache_config_file; if(get_settings('gzipcompression')) { echo "Warning: GZIP compression is enabled in Wordpress, wp-cache will be bypassed until you disable gzip compression.
"; return false; } $lines = file($wp_cache_config_file); foreach($lines as $line) { if (preg_match('/^ *\$cache_enabled *= *true *;/', $line)) return true; } return false; } function wp_cache_replace_line($old, $new, $my_file) { if (!is_writable($my_file)) { echo "Error: file $my_file is not writeable.
\n"; return false; } $found = false; $lines = file($my_file); foreach($lines as $line) { if ( preg_match("/$old/", $line)) { $found = true; break; } } if ($found) { $fd = fopen($my_file, 'w'); foreach($lines as $line) { if ( !preg_match("/$old/", $line)) fputs($fd, $line); else { fputs($fd, "$new //Added by WP-Cache Manager\n"); } } fclose($fd); return true; } $fd = fopen($my_file, 'w'); $done = false; foreach($lines as $line) { if ( $done || !preg_match('/^define|\$|\?>/', $line)) fputs($fd, $line); else { fputs($fd, "$new //Added by WP-Cache Manager\n"); fputs($fd, $line); $done = true; } } fclose($fd); return true; /* copy($my_file, $my_file . "-prev"); rename($my_file . '-new', $my_file); */ } function wp_cache_verify_cache_dir() { global $cache_path; $dir = dirname($cache_path); if ( !file_exists($cache_path) ) { if ( !is_writable( $dir ) || !($dir = mkdir( $cache_path, 0777) ) ) { echo "Error: Your cache directory ($cache_path) did not exist and couldn't be created by the web server.
Check $dir permissions."; return false; } } if ( !is_writable($cache_path)) { echo "Error: Your cache directory ($cache_path) or $dir need to be writable for this plugin to work.
Double-check it."; return false; } if ( '/' != substr($cache_path, -1)) { $cache_path .= '/'; } return true; } function wp_cache_verify_config_file() { global $wp_cache_config_file, $wp_cache_config_file_sample; $new = false; $dir = dirname($wp_cache_config_file); if ( !is_writable($dir)) { echo "Error: wp-content directory ($dir) is not writable by the Web server.
Check its permissions."; return false; } if ( !file_exists($wp_cache_config_file) ) { if ( !file_exists($wp_cache_config_file_sample) ) { echo "Error: Sample WP-Cache config file ($wp_cache_config_file_sample) does not exist.
Verify you installation."; return false; } copy($wp_cache_config_file_sample, $wp_cache_config_file); $new = true; } if ( !is_writable($wp_cache_config_file)) { echo "Error: Your WP-Cache config file ($wp_cache_config_file) is not writable by the Web server.
Check its permissions."; return false; } require($wp_cache_config_file); return true; } function wp_cache_check_link() { global $wp_cache_link, $wp_cache_file; if ( basename(@readlink($wp_cache_link)) != basename($wp_cache_file)) { @unlink($wp_cache_link); if (!@symlink ($wp_cache_file, $wp_cache_link)) { echo "advanced-cache.php link does not exist
"; echo "Create it by executing:
ln -s $wp_cache_file $wp_cache_link
in your server
"; return false; } } return true; } function wp_cache_check_global_config() { $global = ABSPATH . 'wp-config.php'; $lines = file($global); foreach($lines as $line) { if (preg_match('/^ *define *\( *\'WP_CACHE\' *, *true *\) *;/', $line)) { return true; } } $line = 'define(\'WP_CACHE\', true);'; if (!is_writable($global) || !wp_cache_replace_line('define *\( *\'WP_CACHE\'', $line, $global) ) { echo "Error: WP_CACHE is not enabled in your wp-config.php file and I couldn't modified it.
"; echo "Edit $global and add the following line:
define('WP_CACHE', true);
Otherwise, WP-Cache will not be executed by Wordpress core.
"; return false; } return true; } function wp_cache_files() { global $cache_path, $file_prefix, $cache_max_time, $valid_nonce; if ( '/' != substr($cache_path, -1)) { $cache_path .= '/'; } if ( $valid_nonce ) { if(isset($_REQUEST['wp_delete_cache'])) { wp_cache_clean_cache($file_prefix); } if(isset($_REQUEST['wp_delete_cache_file'])) { wp_cache_clean_cache($_REQUEST['wp_delete_cache_file']); } if(isset($_REQUEST['wp_delete_expired'])) { wp_cache_clean_expired($file_prefix); } } if(isset($_REQUEST['wp_list_cache'])) { $list_files = true; $list_mess = "Update list"; } else $list_mess = "List files"; echo '
Cache contents'; echo '
'; echo ''; echo '
'; echo "
\n"; $count = 0; $expired = 0; $now = time(); if ( ($handle = opendir( $cache_path )) ) { if ($list_files) echo ""; while ( false !== ($file = readdir($handle))) { if ( preg_match("/^$file_prefix.*\.meta/", $file) ) { $this_expired = false; $content_file = preg_replace("/meta$/", "html", $file); $mtime = filemtime($cache_path.$file); if ( ! ($fsize = @filesize($cache_path.$content_file)) ) continue; // .meta does not exists $fsize = intval($fsize/1024); $age = $now - $mtime; if ( $age > $cache_max_time) { $expired++; $this_expired = true; } $count++; if ($list_files) { $meta = new CacheMeta; $meta = unserialize(file_get_contents($cache_path . $file)); echo $flip ? '' : ''; $flip = !$flip; echo '"; if ($this_expired) echo ""; else echo ""; echo ""; echo '\n"; } } } closedir($handle); if ($list_files) echo "
'; echo $meta->uri . "$age secs$age secs$fsize KB
'; echo ''; echo ''; echo '
'; wp_nonce_field('wp-cache'); echo "
"; } echo "

$count cached pages

"; echo "

$expired expired pages

"; echo '
'; echo ''; echo ''; echo '
'; wp_nonce_field('wp-cache'); echo "
\n"; echo '
'; echo ''; echo '
'; wp_nonce_field('wp-cache'); echo "
\n"; echo '
'; } function wp_cache_clean_cache($file_prefix) { global $cache_path; // If phase2 was compiled, use its function to avoid race-conditions if(function_exists('wp_cache_phase2_clean_cache')) return wp_cache_phase2_clean_cache($file_prefix); $expr = "/^$file_prefix/"; if ( ($handle = opendir( $cache_path )) ) { while ( false !== ($file = readdir($handle))) { if ( preg_match($expr, $file) ) { unlink($cache_path . $file); } } closedir($handle); } } function wp_cache_clean_expired($file_prefix) { global $cache_path, $cache_max_time; // If phase2 was compiled, use its function to avoid race-conditions if(function_exists('wp_cache_phase2_clean_expired')) return wp_cache_phase2_clean_expired($file_prefix); $expr = "/^$file_prefix/"; $now = time(); if ( ($handle = opendir( $cache_path )) ) { while ( false !== ($file = readdir($handle))) { if ( preg_match($expr, $file) && (filemtime($cache_path . $file) + $cache_max_time) <= $now) { unlink($cache_path . $file); } } closedir($handle); } } add_action('admin_menu', 'wp_cache_add_pages'); ?> $wpsc_version = 169; Why does Aortic Stenosis cause Chest Pain?

Why does Aortic Stenosis cause Chest Pain?

It’s been shown in angiographic studies in patients with aortic stenosis that the direction of flow can reverse in the large coronary arteries during the ejection phase of systole. This means that instead of the blood flowing from the coronaries to the heart wall, it gets ejected into the aorta!

That coupled with the increased demand of the heart muscle for oxygen, lead to the tendency for AS patients to experience chest pain.

And yes, it may be lethal even! It just reiterates that angina pectoris (anterior chest pain associated with inadequate oxygenation to the heart muscle) should never be taken lightly.

October 20, 2008 · Filed under StopAngina

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