diff --git a/extensions/mentions/src/Formatter/UnparsePostMentions.php b/extensions/mentions/src/Formatter/UnparsePostMentions.php
index 519c3f4a1..0a5499caf 100644
--- a/extensions/mentions/src/Formatter/UnparsePostMentions.php
+++ b/extensions/mentions/src/Formatter/UnparsePostMentions.php
@@ -47,7 +47,7 @@ class UnparsePostMentions
                 $attributes['displayname'] = $this->translator->trans('core.lib.username.deleted_text');
             }
 
-            if (strpos($attributes['displayname'], '"#') !== false) {
+            if (str_contains($attributes['displayname'], '"#')) {
                 $attributes['displayname'] = preg_replace('/"#[a-z]{0,3}[0-9]+/', '_', $attributes['displayname']);
             }
 
@@ -62,7 +62,7 @@ class UnparsePostMentions
     {
         $tagName = 'POSTMENTION';
 
-        if (strpos($xml, $tagName) === false) {
+        if (! str_contains($xml, $tagName)) {
             return $xml;
         }
 
diff --git a/extensions/mentions/src/Formatter/UnparseTagMentions.php b/extensions/mentions/src/Formatter/UnparseTagMentions.php
index 483e0517b..0164c16ae 100644
--- a/extensions/mentions/src/Formatter/UnparseTagMentions.php
+++ b/extensions/mentions/src/Formatter/UnparseTagMentions.php
@@ -49,7 +49,7 @@ class UnparseTagMentions
     {
         $tagName = 'TAGMENTION';
 
-        if (strpos($xml, $tagName) === false) {
+        if (! str_contains($xml, $tagName)) {
             return $xml;
         }
 
diff --git a/extensions/mentions/src/Formatter/UnparseUserMentions.php b/extensions/mentions/src/Formatter/UnparseUserMentions.php
index fc56df2ba..63c9af018 100644
--- a/extensions/mentions/src/Formatter/UnparseUserMentions.php
+++ b/extensions/mentions/src/Formatter/UnparseUserMentions.php
@@ -40,7 +40,7 @@ class UnparseUserMentions
 
             $attributes['displayname'] = $user?->display_name ?? $this->translator->trans('core.lib.username.deleted_text');
 
-            if (strpos($attributes['displayname'], '"#') !== false) {
+            if (str_contains($attributes['displayname'], '"#')) {
                 $attributes['displayname'] = preg_replace('/"#[a-z]{0,3}[0-9]+/', '_', $attributes['displayname']);
             }
 
@@ -55,7 +55,7 @@ class UnparseUserMentions
     {
         $tagName = 'USERMENTION';
 
-        if (strpos($xml, $tagName) === false) {
+        if (! str_contains($xml, $tagName)) {
             return $xml;
         }
 
diff --git a/extensions/package-manager/src/Command/RequireExtensionHandler.php b/extensions/package-manager/src/Command/RequireExtensionHandler.php
index 383706b26..23151201e 100755
--- a/extensions/package-manager/src/Command/RequireExtensionHandler.php
+++ b/extensions/package-manager/src/Command/RequireExtensionHandler.php
@@ -45,7 +45,7 @@ class RequireExtensionHandler
         $packageName = $command->package;
 
         // Auto append :* if not requiring a specific version.
-        if (strpos($packageName, ':') === false) {
+        if (! str_contains($packageName, ':')) {
             $packageName .= ':*';
         }