Potential errors are silenced in your project

More information: https://insight.symfony.com/what-we-analyse/php.silenced_error

in src/Traits/PdfAttachmentTrait.php, line 128 
  2.                 return;
  3.             }
  4.             $size = \strlen($fc);
  5.             $time = false !== \filemtime($file) ? \filemtime($file) : \time();
  6.             $date = @\date('YmdHisO', $time);
    Adding "@" before \date('YmdHisO', $time) prevents warning and errors during this function execution from being displayed.
    
If you need to do that, you should probably implement a better way to qualify and recover from errors, using Exceptions.
    Time to fix: about 4 hours
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                                    Last edited  by Andreas Müller
                    
  7.             $md = 'D:' . \substr($date, 0, -2) . "'" . \substr($date, -2) . "'";
  9.             $this->putNewObj();
  10.             $info['n'] = $this->objectNumber;
  11.             $this->put('<<');