errore warning a causa ddegli header

[rocco.mod]

ciao e grazie , comunque credo sia qua il problema

        function _out($dump) 
        { 
             
            if ( $this->filename ){ 
                $fptr = fopen($this->filename, "wb" ); 
                 
                if ($fptr){ 
                     
                     if($this->compress) 
                    { 
                     
                        $gzbackupData = "x1fx8bx08x00x00x00x00x00" . substr(gzcompress($dump, 9), 0, -4 ) . pack( 'V', crc32($dump) ) . pack( 'V', strlen($dump)); 
                        fwrite($fptr, $gzbackupData); 
                         
                      }else{ 
                       
                        fwrite($fptr, $dump); 
                         
                    } 
                     
                    fclose($fptr); 
                } 
             } 
             else 
             { 
             
            if(($this->compress) && ($this->output)) 
            { 
             
                    $gzbackupData = "x1fx8bx08x00x00x00x00x00" . substr( gzcompress($dump, 9), 0, -4 ) . pack( 'V', crc32($dump) ) . pack( 'V', strlen($dump) ); 
                    echo $gzbackupData; 
                     
            }else{ 
                   
                    echo $dump; 
                     
           } 
          } 
        }