diff --git a/mod/match.php b/mod/match.php
index c4bea6767b..caa4c944ca 100644
--- a/mod/match.php
+++ b/mod/match.php
@@ -94,11 +94,11 @@ function match_content(App $a)
 
 					$entry = [
 						'url' => Contact::magicLink($jj->url),
-						'itemurl' => (($contact_details['addr'] != "") ? $contact_details['addr'] : $jj->url),
+						'itemurl' => defaults($contact_details, 'addr', $jj->url),
 						'name' => $jj->name,
-						'details'       => $contact_details['location'],
-						'tags'          => $contact_details['keywords'],
-						'about'         => $contact_details['about'],
+						'details'       => defaults($contact_details, 'location', ''),
+						'tags'          => defaults($contact_details, 'keywords', ''),
+						'about'         => defaults($contact_details, 'about', ''),
 						'account_type'  => Contact::getAccountType($contact_details),
 						'thumb' => ProxyUtils::proxifyUrl($jj->photo, false, ProxyUtils::SIZE_THUMB),
 						'inttxt' => ' ' . L10n::t('is interested in:'),
diff --git a/mod/profperm.php b/mod/profperm.php
index 4ee933e6cb..ee5e2f23d7 100644
--- a/mod/profperm.php
+++ b/mod/profperm.php
@@ -12,7 +12,7 @@ use Friendica\Model\Profile;
 
 function profperm_init(App $a)
 {
-	if (! local_user()) {
+	if (!local_user()) {
 		return;
 	}
 
@@ -25,7 +25,7 @@ function profperm_init(App $a)
 
 function profperm_content(App $a) {
 
-	if (! local_user()) {
+	if (!local_user()) {
 		notice(L10n::t('Permission denied') . EOL);
 		return;
 	}
@@ -45,7 +45,7 @@ function profperm_content(App $a) {
 		$switchtotext = Config::get('system','groupedit_image_limit', 400);
 	}
 
-	if(($a->argc > 2) && intval($a->argv[1]) && intval($a->argv[2])) {
+	if (($a->argc > 2) && intval($a->argv[1]) && intval($a->argv[2])) {
 		$r = q("SELECT `id` FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `self` = 0
 			AND `network` = '%s' AND `id` = %d AND `uid` = %d LIMIT 1",
 			DBA::escape(Protocol::DFRN),
@@ -64,7 +64,7 @@ function profperm_content(App $a) {
 			intval($a->argv[1]),
 			intval(local_user())
 		);
-		if (! DBA::isResult($r)) {
+		if (!DBA::isResult($r)) {
 			notice(L10n::t('Invalid profile identifier.') . EOL );
 			return;
 		}
@@ -82,8 +82,8 @@ function profperm_content(App $a) {
 
 		$members = $r;
 
-		if($change) {
-			if(in_array($change,$ingroup)) {
+		if (!empty($change)) {
+			if (in_array($change,$ingroup)) {
 				q("UPDATE `contact` SET `profile-id` = 0 WHERE `id` = %d AND `uid` = %d",
 					intval($change),
 					intval(local_user())
@@ -120,7 +120,7 @@ function profperm_content(App $a) {
 	}
 
 	$o .= '<div id="prof-update-wrapper">';
-	if($change)
+	if (!empty($change))
 		$o = '';
 
 	$o .= '<div id="prof-members-title">';
@@ -131,7 +131,7 @@ function profperm_content(App $a) {
 	$textmode = (($switchtotext && (count($members) > $switchtotext)) ? true : false);
 
 	foreach($members as $member) {
-		if($member['url']) {
+		if ($member['url']) {
 			$member['click'] = 'profChangeMember(' . $profile['id'] . ',' . $member['id'] . '); return true;';
 			$o .= micropro($member,true,'mpprof', $textmode);
 		}
@@ -153,7 +153,7 @@ function profperm_content(App $a) {
 		if (DBA::isResult($r)) {
 			$textmode = (($switchtotext && (count($r) > $switchtotext)) ? true : false);
 			foreach($r as $member) {
-				if(! in_array($member['id'],$ingroup)) {
+				if (!in_array($member['id'],$ingroup)) {
 					$member['click'] = 'profChangeMember(' . $profile['id'] . ',' . $member['id'] . '); return true;';
 					$o .= micropro($member,true,'mpprof',$textmode);
 				}
@@ -162,7 +162,7 @@ function profperm_content(App $a) {
 
 		$o .= '</div><div id="prof-all-contacts-end"></div>';
 
-	if($change) {
+	if (!empty($change)) {
 		echo $o;
 		killme();
 	}
diff --git a/mod/videos.php b/mod/videos.php
index 505c3c2a8f..fcdd96d09c 100644
--- a/mod/videos.php
+++ b/mod/videos.php
@@ -365,6 +365,7 @@ function videos_content(App $a)
 	if (DBA::isResult($r)) {
 		foreach ($r as $rr) {
 			$alt_e = $rr['filename'];
+			/// @todo The album isn't part of the above query. This seems to be some unfinished code that needs to be reworked completely.
 			$name_e = $rr['album'];
 
 			$videos[] = [
diff --git a/src/Model/Event.php b/src/Model/Event.php
index 1bc922b465..91579faa19 100644
--- a/src/Model/Event.php
+++ b/src/Model/Event.php
@@ -62,7 +62,7 @@ class Event extends BaseObject
 				$o .= "<h4>" . L10n::t('Finishes:') . "</h4><p>" . $event_end . "</p>";
 			}
 
-			if (strlen($event['location'])) {
+			if (!empty($event['location'])) {
 				$o .= "<h4>" . L10n::t('Location:') . "</h4><p>" . BBCode::convert($event['location'], false, $simple) . "</p>";
 			}