diff --git a/buffer/buffer.php b/buffer/buffer.php
index 6be69ca8..1f50aa30 100644
--- a/buffer/buffer.php
+++ b/buffer/buffer.php
@@ -73,8 +73,8 @@ function buffer_addon_admin(App $a, &$o)
 
 function buffer_addon_admin_post(App $a)
 {
-	$client_id     = (!empty($_POST['client_id'])     ? trim($_POST['client_id'])     : '');
-	$client_secret = (!empty($_POST['client_secret']) ? trim($_POST['client_secret']) : '');
+	$client_id     = trim($_POST['client_id'] ?? '');
+	$client_secret = trim($_POST['client_secret'] ?? '');
 
 	DI::config()->set('buffer', 'client_id'    , $client_id);
 	DI::config()->set('buffer', 'client_secret', $client_secret);
diff --git a/geocoordinates/geocoordinates.php b/geocoordinates/geocoordinates.php
index 08b45cec..d3f06fdb 100644
--- a/geocoordinates/geocoordinates.php
+++ b/geocoordinates/geocoordinates.php
@@ -90,9 +90,9 @@ function geocoordinates_addon_admin(&$a, &$o)
 
 function geocoordinates_addon_admin_post(&$a)
 {
-	$api_key  = (!empty($_POST['api_key']) ? trim($_POST['api_key']) : '');
+	$api_key  = trim($_POST['api_key'] ?? '');
 	DI::config()->set('geocoordinates', 'api_key', $api_key);
 
-	$language  = (!empty($_POST['language']) ? trim($_POST['language']) : '');
+	$language  = trim($_POST['language'] ?? '');
 	DI::config()->set('geocoordinates', 'language', $language);
 }
diff --git a/gravatar/gravatar.php b/gravatar/gravatar.php
index 3846d973..b49e7e94 100644
--- a/gravatar/gravatar.php
+++ b/gravatar/gravatar.php
@@ -108,8 +108,8 @@ function gravatar_addon_admin (&$a, &$o) {
 function gravatar_addon_admin_post (&$a) {
 	BaseModule::checkFormSecurityToken('gravatarsave');
 
-	$default_avatar = (!empty($_POST['avatar']) ? trim($_POST['avatar']) : 'identicon');
-	$rating = (!empty($_POST['rating']) ? trim($_POST['rating']) : 'g');
+	$default_avatar = trim($_POST['avatar'] ?? 'identicon');
+	$rating = trim($_POST['rating'] ?? 'g');
 	DI::config()->set('gravatar', 'default_avatar', $default_avatar);
 	DI::config()->set('gravatar', 'rating', $rating);
 }
diff --git a/impressum/impressum.php b/impressum/impressum.php
index 3bdc2465..3409f33b 100644
--- a/impressum/impressum.php
+++ b/impressum/impressum.php
@@ -78,12 +78,12 @@ function impressum_show($a,&$b) {
 }
 
 function impressum_addon_admin_post (&$a) {
-    $owner = (!empty($_POST['owner']) ? trim($_POST['owner']) : '');
-    $ownerprofile = (!empty($_POST['ownerprofile']) ? trim($_POST['ownerprofile']) : '');
-    $postal = (!empty($_POST['postal']) ? (trim($_POST['postal'])) : '');
-    $notes = (!empty($_POST['notes']) ? (trim($_POST['notes'])) : '');
-    $email = (!empty($_POST['email']) ? trim($_POST['email']) : '');
-    $footer_text = (!empty($_POST['footer_text']) ? (trim($_POST['footer_text'])) : '');
+    $owner = trim($_POST['owner'] ?? '');
+    $ownerprofile = trim($_POST['ownerprofile'] ?? '');
+    $postal = trim($_POST['postal'] ?? '');
+    $notes = trim($_POST['notes'] ?? '');
+    $email = trim($_POST['email'] ?? '');
+    $footer_text = trim($_POST['footer_text'] ?? '');
     DI::config()->set('impressum','owner',strip_tags($owner));
     DI::config()->set('impressum','ownerprofile',strip_tags($ownerprofile));
     DI::config()->set('impressum','postal',strip_tags($postal));
diff --git a/libravatar/libravatar.php b/libravatar/libravatar.php
index d702874b..2458f52b 100644
--- a/libravatar/libravatar.php
+++ b/libravatar/libravatar.php
@@ -89,6 +89,6 @@ function libravatar_addon_admin(&$a, &$o)
  */
 function libravatar_addon_admin_post(&$a)
 {
-	$default_avatar = (!empty($_POST['avatar']) ? trim($_POST['avatar']) : 'identicon');
+	$default_avatar = trim($_POST['avatar'] ?? 'identicon');
 	DI::config()->set('libravatar', 'default_avatar', $default_avatar);
 }
diff --git a/newmemberwidget/newmemberwidget.php b/newmemberwidget/newmemberwidget.php
index c6122a52..398b908c 100644
--- a/newmemberwidget/newmemberwidget.php
+++ b/newmemberwidget/newmemberwidget.php
@@ -48,7 +48,7 @@ function newmemberwidget_network_mod_init ($a, $b)
 function newmemberwidget_addon_admin_post(&$a)
 {
 	$ft = (!empty($_POST['freetext']) ? trim($_POST['freetext']) : "");
-	$lsn = (!empty($_POST['localsupportname']) ? trim($_POST['localsupportname']) : "");
+	$lsn = trim($_POST['localsupportname'] ?? '');
 	$gs = intval($_POST['linkglobalsupport']);
 	$ls = intval($_POST['linklocalsupport']);
 	DI::config()->set('newmemberwidget', 'freetext',           trim($ft));
diff --git a/piwik/piwik.php b/piwik/piwik.php
index 4035f467..8c4f91df 100644
--- a/piwik/piwik.php
+++ b/piwik/piwik.php
@@ -101,10 +101,10 @@ function piwik_addon_admin (&$a, &$o) {
 	]);
 }
 function piwik_addon_admin_post (&$a) {
-	$url = (!empty($_POST['baseurl']) ? trim($_POST['baseurl']) : '');
-	$id = (!empty($_POST['siteid']) ? trim($_POST['siteid']) : '');
-	$optout = (!empty($_POST['optout']) ? trim($_POST['optout']) : '');
-	$async = (!empty($_POST['async']) ? trim($_POST['async']) : '');
+	$url = trim($_POST['baseurl'] ?? '');
+	$id = trim($_POST['siteid'] ?? '');
+	$optout = trim($_POST['optout'] ?? '');
+	$async = trim($_POST['async'] ?? '');
 	DI::config()->set('piwik', 'baseurl', $url);
 	DI::config()->set('piwik', 'siteid', $id);
 	DI::config()->set('piwik', 'optout', $optout);
diff --git a/public_server/public_server.php b/public_server/public_server.php
index 97e4b785..70aaacee 100644
--- a/public_server/public_server.php
+++ b/public_server/public_server.php
@@ -125,12 +125,12 @@ function public_server_login($a, $b)
 function public_server_addon_admin_post(&$a)
 {
 	BaseModule::checkFormSecurityTokenRedirectOnError('/admin/addons/publicserver', 'publicserver');
-	$expiredays = (!empty($_POST['expiredays']) ? trim($_POST['expiredays']) : '');
-	$expireposts = (!empty($_POST['expireposts']) ? trim($_POST['expireposts']) : '');
-	$nologin = (!empty($_POST['nologin']) ? trim($_POST['nologin']) : '');
-	$flagusers = (!empty($_POST['flagusers']) ? trim($_POST['flagusers']) : '');
-	$flagposts = (!empty($_POST['flagposts']) ? trim($_POST['flagposts']) : '');
-	$flagpostsexpire = (!empty($_POST['flagpostsexpire']) ? trim($_POST['flagpostsexpire']) : '');
+	$expiredays = trim($_POST['expiredays'] ?? '');
+	$expireposts = trim($_POST['expireposts'] ?? '');
+	$nologin = trim($_POST['nologin'] ?? '');
+	$flagusers = trim($_POST['flagusers'] ?? '');
+	$flagposts = trim($_POST['flagposts'] ?? '');
+	$flagpostsexpire = trim($_POST['flagpostsexpire'] ?? '');
 	DI::config()->set('public_server', 'expiredays', $expiredays);
 	DI::config()->set('public_server', 'expireposts', $expireposts);
 	DI::config()->set('public_server', 'nologin', $nologin);
diff --git a/tumblr/tumblr.php b/tumblr/tumblr.php
index a6c598b3..f92de89f 100644
--- a/tumblr/tumblr.php
+++ b/tumblr/tumblr.php
@@ -75,8 +75,8 @@ function tumblr_addon_admin(App $a, &$o)
 
 function tumblr_addon_admin_post(App $a)
 {
-	$consumer_key    = (!empty($_POST['consumer_key'])    ? trim($_POST['consumer_key'])   : '');
-	$consumer_secret = (!empty($_POST['consumer_secret']) ? trim($_POST['consumer_secret']): '');
+	$consumer_key    = trim($_POST['consumer_key'] ?? : '');
+	$consumer_secret = trim($_POST['consumer_secret'] ?? '');
 
 	DI::config()->set('tumblr', 'consumer_key',$consumer_key);
 	DI::config()->set('tumblr', 'consumer_secret',$consumer_secret);
diff --git a/twitter/twitter.php b/twitter/twitter.php
index c6215fab..9811a06a 100644
--- a/twitter/twitter.php
+++ b/twitter/twitter.php
@@ -791,8 +791,8 @@ function twitter_post_hook(App $a, array &$b)
 
 function twitter_addon_admin_post(App $a)
 {
-	$consumerkey    = !empty($_POST['consumerkey'])    ? trim($_POST['consumerkey'])    : '';
-	$consumersecret = !empty($_POST['consumersecret']) ? trim($_POST['consumersecret']) : '';
+	$consumerkey    = trim($_POST['consumerkey'] ?? : '');
+	$consumersecret = trim($_POST['consumersecret'] ?? '');
 	DI::config()->set('twitter', 'consumerkey', $consumerkey);
 	DI::config()->set('twitter', 'consumersecret', $consumersecret);
 }
diff --git a/webrtc/webrtc.php b/webrtc/webrtc.php
index b3c7ced8..29c7fc8f 100644
--- a/webrtc/webrtc.php
+++ b/webrtc/webrtc.php
@@ -26,7 +26,7 @@ function webrtc_addon_admin (&$a, &$o) {
 	]);
 }
 function webrtc_addon_admin_post (&$a) {
-        $url = (!empty($_POST['webrtcurl']) ? trim($_POST['webrtcurl']) : '');
+        $url = trim($_POST['webrtcurl'] ?? '');
 	    DI::config()->set('webrtc', 'webrtcurl', $url);
 }