more PHP 8.1 deprecated warnings

5 files changed, 10 insertions, 6 deletions

diff --git a/include/contact_widgets.php b/include/contact_widgets.php
index 875a519a5..1ae8b17c5 100644
--- a/include/contact_widgets.php
+++ b/include/contact_widgets.php
@@ -100,6 +100,10 @@ function categories_widget($baseurl,$selected = '') {
 		\Zotlabs\Daemon\Master::Summon([ 'Cache_query', $key, base64_encode(json_encode($arr)) ]);
 	}
 
+	if (!$content) {
+		return EMPTY_STR;
+	}
+
 	$r = unserialize($content);
 
 	$terms = [];
diff --git a/include/conversation.php b/include/conversation.php
index 17367856c..c0238b8ae 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -558,7 +558,7 @@ function conversation($items, $mode, $update, $page_mode = 'traditional', $prepa
 		$page_writeable = ($profile_owner == local_channel());
 
 		if (!$update) {
-			$tab = notags(trim($_GET['tab']));
+			$tab = notags(trim((string)$_GET['tab']));
 			if ($tab === 'posts') {
 				// This is ugly, but we can't pass the profile_uid through the session to the ajax updater,
 				// because browser prefetching might change it on us. We have to deliver it with the page.
@@ -974,7 +974,7 @@ function best_link_url($item) {
 		}
 	}
 	if(! $best_url) {
-		if(strlen($item['author-link']))
+		if($item['author-link'])
 			$best_url = $item['author-link'];
 		else
 			$best_url = $item['url'];
diff --git a/include/items.php b/include/items.php
index e198ea54f..0b33d876d 100644
--- a/include/items.php
+++ b/include/items.php
@@ -1446,7 +1446,7 @@ function activity_sanitise($arr) {
 				if(is_array($x))
 					$ret[$k] = activity_sanitise($x);
 				else
-					$ret[$k] = htmlspecialchars($x, ENT_COMPAT, 'UTF-8', false);
+					$ret[$k] = htmlspecialchars((string)$x, ENT_COMPAT, 'UTF-8', false);
 			}
 			return $ret;
 		}
@@ -4438,7 +4438,7 @@ function items_fetch($arr,$channel = null,$observer_hash = null,$client_mode = C
 			);
 	}
 
-	if(strlen($arr['file'])) {
+	if($arr['file']) {
 		$sql_extra .= term_query('item',$arr['files'],TERM_FILE);
 	}
 
diff --git a/include/text.php b/include/text.php
index 2e5e728a0..29a2ab3b1 100644
--- a/include/text.php
+++ b/include/text.php
@@ -846,7 +846,7 @@ function activity_match($haystack,$needle) {
 
 	if($needle) {
 		foreach($needle as $n) {
-			if(($haystack === $n) || (strtolower(basename($n)) === strtolower(basename($haystack)))) {
+			if(($haystack === $n) || (strtolower(basename((string)$n)) === strtolower(basename((string)$haystack)))) {
 				return true;
 			}
 		}
diff --git a/include/zid.php b/include/zid.php
index e462f8357..ae7d9e252 100644
--- a/include/zid.php
+++ b/include/zid.php
@@ -37,7 +37,7 @@ function is_matrix_url($url) {
  * @return string
  */
 function zid($s, $address = '') {
-	if (! strlen($s) || strpos($s,'zid='))
+	if (!$s || strpos($s,'zid='))
 		return $s;
 
 	$m = parse_url($s);