phpexcel 加锁

 $objPHPExcel->getActiveSheet()->getProtection()->setSheet(true);
 $objPHPExcel->getActiveSheet()->protectCells(\'A1:\'. $w_str . "2", \'PHPExcel\');
 $objPHPExcel->getActiveSheet()->getStyle(\'B3:\' . $str.$h)->getProtection()->setLocked(PHPExcel_Style_Protection::PROTECTION_UNPROTECTED);