Silent error see #8145

main/inc/lib/phpmailer/class.phpmailer.php

@@ -1739,15 +1739,15 @@ class PHPMailer {
 
     switch (strtolower($position)) {
       case 'phrase':
-        $encoded = preg_replace("/([^A-Za-z0-9!*+\/ -])/e", "'='.sprintf('%02X', ord('\\1'))", $encoded);
+        $encoded = @preg_replace("/([^A-Za-z0-9!*+\/ -])/e", "'='.sprintf('%02X', ord('\\1'))", $encoded);
         break;
       case 'comment':
-        $encoded = preg_replace("/([\(\)\"])/e", "'='.sprintf('%02X', ord('\\1'))", $encoded);
+        $encoded = @preg_replace("/([\(\)\"])/e", "'='.sprintf('%02X', ord('\\1'))", $encoded);
       case 'text':
       default:
         // Replace every high ascii, control =, ? and _ characters
         //TODO using /e (equivalent to eval()) is probably not a good idea
-        $encoded = preg_replace('/([\000-\011\013\014\016-\037\075\077\137\177-\377])/e',
+        $encoded = @preg_replace('/([\000-\011\013\014\016-\037\075\077\137\177-\377])/e',
               "'='.sprintf('%02X', ord('\\1'))", $encoded);
         break;
     }