php


Php to excel always open in excel read only mode [closed]


Why its always open in excel read only mode? and showed this message.
header("Content-Type: application/vnd.ms-excel; charset=utf-8");
header("Content-Disposition: attachment; filename=abc.xls"); //File name extension was wrong
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false);
echo $output;

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