diff --git a/LibreNMS/Validations/Database/CheckSchemaStructure.php b/LibreNMS/Validations/Database/CheckSchemaStructure.php
index b1d7a491b286..e0c3533c58de 100644
--- a/LibreNMS/Validations/Database/CheckSchemaStructure.php
+++ b/LibreNMS/Validations/Database/CheckSchemaStructure.php
@@ -264,7 +264,7 @@ private function dropTableSql(string $table): string
      */
     private function columnToSql(array $column_data): string
     {
-        $segments = ["`${column_data['Field']}`", $column_data['Type']];
+        $segments = ["`{$column_data['Field']}`", $column_data['Type']];
 
         $segments[] = $column_data['Null'] ? 'NULL' : 'NOT NULL';
 
@@ -274,7 +274,7 @@ private function columnToSql(array $column_data): string
             } elseif ($column_data['Default'] == 'NULL') {
                 $segments[] = 'DEFAULT NULL';
             } else {
-                $segments[] = "DEFAULT '${column_data['Default']}'";
+                $segments[] = "DEFAULT '{$column_data['Default']}'";
             }
         }
 
diff --git a/database/seeders/DefaultAlertTemplateSeeder.php b/database/seeders/DefaultAlertTemplateSeeder.php
index 9ee562c79bc1..8eadaed6824f 100644
--- a/database/seeders/DefaultAlertTemplateSeeder.php
+++ b/database/seeders/DefaultAlertTemplateSeeder.php
@@ -48,7 +48,7 @@ public function run(): void
                     @if ($alert->faults)
                     Faults:
                     @foreach ($alert->faults as $key => $value)
-                    @php($unit = __("sensors.${value["sensor_class"]}.unit"))
+                    @php($unit = __("sensors.{$value["sensor_class"]}.unit"))
                     #{{ $key }}: {{ $value['sensor_descr'] ?? 'Sensor' }}
 
                     Current: {{ $value['sensor_current'].$unit }}
diff --git a/includes/html/modal/new_bill.inc.php b/includes/html/modal/new_bill.inc.php
index 2236966211a1..3feca93f9b11 100644
--- a/includes/html/modal/new_bill.inc.php
+++ b/includes/html/modal/new_bill.inc.php
@@ -58,7 +58,7 @@
                                 $interface = cleanPort($interface);
                                 $string = $interface['label'] . ' - ' . \LibreNMS\Util\Clean::html($interface['ifAlias'], []);
                                 $selected = $interface['port_id'] === $port['port_id'] ? ' selected' : '';
-                                echo "<option value='${interface['port_id']}' $selected>$string</option>\n";
+                                echo "<option value='{$interface['port_id']}' $selected>$string</option>\n";
                             }
                         } ?>
                         </select>
diff --git a/includes/html/pages/notifications.inc.php b/includes/html/pages/notifications.inc.php
index 13ea55b52ca0..e4045069d78d 100644
--- a/includes/html/pages/notifications.inc.php
+++ b/includes/html/pages/notifications.inc.php
@@ -83,7 +83,7 @@
         echo '<div class="well"><div class="row"> <div class="col-md-12">';
 
         $class = $notif['severity'] == 2 ? 'text-danger' : 'text-warning';
-        echo "<h4 class='$class' id='${notif['notifications_id']}'>";
+        echo "<h4 class='$class' id='{$notif['notifications_id']}'>";
         echo "<strong><i class='fa fa-bell-o'></i>&nbsp;" . htmlentities($notif['title']) . '</strong>';
         echo "<span class='pull-right'>";
 
@@ -125,7 +125,7 @@
         } elseif ($notif['severity'] == 2) {
             $class = 'text-danger';
         }
-        echo "<h4 class='$class' id='${notif['notifications_id']}'>" . htmlentities($notif['title']) . "<span class='pull-right'>";
+        echo "<h4 class='$class' id='{$notif['notifications_id']}'>" . htmlentities($notif['title']) . "<span class='pull-right'>";
 
         if (Auth::user()->hasGlobalAdmin()) {
             echo '<button class="btn btn-primary fa fa-bell-o stick-notif" data-toggle="tooltip" data-placement="bottom" title="Mark as Sticky" style="margin-top:-10px;"></button>';
@@ -168,7 +168,7 @@
         } elseif ($notif['severity'] == 2) {
             echo ' class="text-danger"';
         }
-        echo  " id='${notif['notifications_id']}'>" . htmlentities($notif['title']);
+        echo  " id='{$notif['notifications_id']}'>" . htmlentities($notif['title']);
 
         if (Auth::user()->isAdmin()) {
             echo '<span class="pull-right"><button class="btn btn-primary fa fa-bell-o stick-notif" data-toggle="tooltip" data-placement="bottom" title="Mark as Sticky" style="margin-top:-10px;"></button></span>';
diff --git a/includes/html/table/bills.inc.php b/includes/html/table/bills.inc.php
index b296cbaad12b..a5cc3cca5aae 100644
--- a/includes/html/table/bills.inc.php
+++ b/includes/html/table/bills.inc.php
@@ -141,7 +141,7 @@
     $background = \LibreNMS\Util\Color::percentage($percent, null);
     $right_background = $background['right'];
     $left_background = $background['left'];
-    $overuse_formatted = (($overuse <= 0) ? '-' : "<span style='color: #${background['left']}; font-weight: bold;'>$overuse_formatted</span>");
+    $overuse_formatted = (($overuse <= 0) ? '-' : "<span style='color: #{$background['left']}; font-weight: bold;'>$overuse_formatted</span>");
 
     $bill_name = "<a href='$url'><span style='font-weight: bold;' class='interface'>" . htmlentities($bill['bill_name']) . '</span></a><br />' .
                     date('Y-m-d', strtotime($datefrom)) . ' to ' . date('Y-m-d', strtotime($dateto));
diff --git a/poll-billing.php b/poll-billing.php
index 9235358943d2..191b875ac650 100755
--- a/poll-billing.php
+++ b/poll-billing.php
@@ -65,7 +65,7 @@
         $host = $port_data['hostname'];
         $port = $port_data['port'];
 
-        echo "  Polling ${port_data['ifName']} (${port_data['ifDescr']}) on ${port_data['hostname']}\n";
+        echo "  Polling {$port_data['ifName']} ({$port_data['ifDescr']}) on {$port_data['hostname']}\n";
 
         $port_data['in_measurement'] = Billing::getValue($port_data['hostname'], $port_data['port'], $port_data['ifIndex'], 'In');
         $port_data['out_measurement'] = Billing::getValue($port_data['hostname'], $port_data['port'], $port_data['ifIndex'], 'Out');