From 998bfddd69a74d9f9a4359edb91095962f70d7ad Mon Sep 17 00:00:00 2001
From: MathiasReker <mathias@reker.dk>
Date: Thu, 16 Jun 2022 19:34:47 +0200
Subject: [PATCH] explicit indirect variable

Add curly braces to indirect variables to make them clear to understand.
---
 src/PHPMailer.php | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/PHPMailer.php b/src/PHPMailer.php
index d5c79612..de6dd35f 100644
--- a/src/PHPMailer.php
+++ b/src/PHPMailer.php
@@ -1555,17 +1555,17 @@ class PHPMailer
 
             //Validate From, Sender, and ConfirmReadingTo addresses
             foreach (['From', 'Sender', 'ConfirmReadingTo'] as $address_kind) {
-                $this->$address_kind = trim($this->$address_kind);
-                if (empty($this->$address_kind)) {
+                $this->{$address_kind} = trim($this->{$address_kind});
+                if (empty($this->{$address_kind})) {
                     continue;
                 }
-                $this->$address_kind = $this->punyencodeAddress($this->$address_kind);
-                if (!static::validateAddress($this->$address_kind)) {
+                $this->{$address_kind} = $this->punyencodeAddress($this->{$address_kind});
+                if (!static::validateAddress($this->{$address_kind})) {
                     $error_message = sprintf(
                         '%s (%s): %s',
                         $this->lang('invalid_address'),
                         $address_kind,
-                        $this->$address_kind
+                        $this->{$address_kind}
                     );
                     $this->setError($error_message);
                     $this->edebug($error_message);
@@ -1665,7 +1665,7 @@ class PHPMailer
                 default:
                     $sendMethod = $this->Mailer . 'Send';
                     if (method_exists($this, $sendMethod)) {
-                        return $this->$sendMethod($this->MIMEHeader, $this->MIMEBody);
+                        return $this->{$sendMethod}($this->MIMEHeader, $this->MIMEBody);
                     }
 
                     return $this->mailSend($this->MIMEHeader, $this->MIMEBody);
@@ -4580,7 +4580,7 @@ class PHPMailer
     public function set($name, $value = '')
     {
         if (property_exists($this, $name)) {
-            $this->$name = $value;
+            $this->{$name} = $value;
 
             return true;
         }