18:56:52 Create new PHPExcel object
18:56:52 Set document properties
18:56:52 Add some data
18:56:52 Add comments
18:56:52 Add rich-text string
18:56:52 Merge cells
18:56:52 Protect cells
18:56:52 Set cell number formats
18:56:52 Set column widths
18:56:52 Set fonts
18:56:52 Set alignments
18:56:52 Set thin black border outline around column
18:56:52 Set thick brown border outline around Total
18:56:52 Set fills
18:56:52 Set style for header row using alternative method
18:56:52 Unprotect a cell
18:56:52 Add a hyperlink to an external website
18:56:52 Add a hyperlink to another cell on a different worksheet within the workbook
18:56:52 Add a drawing to the worksheet
18:56:52 Add a drawing to the worksheet
18:56:52 Add a drawing to the worksheet
18:56:52 Play around with inserting and removing rows and columns
18:56:52 Set header/footer
18:56:52 Set page orientation and size
18:56:52 Rename first worksheet
18:56:52 Create a second Worksheet object
18:56:52 Add some data
18:56:52 Set the worksheet tab color
18:56:52 Set alignments
18:56:52 Set column widths
18:56:52 Set fonts
18:56:52 Add a drawing to the worksheet
18:56:52 Set page orientation and size
18:56:52 Rename second worksheet
18:56:52 Write to CSV format

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Fatal error: Uncaught PHPExcel_Writer_Exception: Could not open file /var/www/html/examcontroller-api/vendor/phpoffice/phpexcel/Examples/16csv.csv for writing. in /var/www/html/examcontroller-api/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/CSV.php:116 Stack trace: #0 /var/www/html/examcontroller-api/vendor/phpoffice/phpexcel/Examples/16csv.php(50): PHPExcel_Writer_CSV->save('/var/www/html/e...') #1 {main} thrown in /var/www/html/examcontroller-api/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/CSV.php on line 116