X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=include%2Fcache.php;h=98799bcf40ff904c70c7b08910b72005b221be63;hb=27b3943cc7a79ad16be45276f4676de22fc38617;hp=b8016ac4574c37ff73b280dd63101adeb04d4aa6;hpb=5459b00499c01bcf450669bcf42798f0cb049bef;p=friendica.git

diff --git a/include/cache.php b/include/cache.php
index b8016ac457..98799bcf40 100644
--- a/include/cache.php
+++ b/include/cache.php
@@ -84,9 +84,14 @@ class Cache {
 		$memcache = self::memcache();
 		if (is_object($memcache)) {
 			// We fetch with the hostname as key to avoid problems with other applications
-			$value = $memcache->get(get_app()->get_hostname().":".$key);
-			if (!is_bool($value)) {
-				return unserialize($value);
+			$cached = $memcache->get(get_app()->get_hostname().":".$key);
+			$value = @unserialize($cached);
+
+			// Only return a value if the serialized value is valid.
+			// We also check if the db entry is a serialized
+			// boolean 'false' value (which we want to return).
+			if ($cached === serialize(false) || $value !== false) {
+				return $value;
 			}
 
 			return null;
@@ -100,7 +105,15 @@ class Cache {
 		);
 
 		if (dbm::is_result($r)) {
-			return unserialize($r[0]['v']);
+			$cached = $r[0]['v'];
+			$value = @unserialize($cached);
+
+			// Only return a value if the serialized value is valid.
+			// We also check if the db entry is a serialized
+			// boolean 'false' value (which we want to return).
+			if ($cached === serialize(false) || $value !== false) {
+				return $value;
+			}
 		}
 
 		return null;
@@ -173,7 +186,7 @@ class Cache {
 			set_config("system", "cache_cleared_half_hour", time());
 		}
 
-		if (($max_level <= CACHE_QUARTER_HOUR) AND (get_config("system", "cache_cleared_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
+		if (($max_level <= CACHE_QUARTER_HOUR) AND (get_config("system", "cache_cleared_quarter_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
 			q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
 				dbesc(datetime_convert('UTC','UTC',"now - 15 minutes")), intval(CACHE_QUARTER_HOUR));