09:55:11 Create new PHPExcel object
09:55:11 Set document properties
09:55:11 Add some data

Notice: Trying to access array offset on value of type float in /var/www/html/API/class/PHPExcel-1.8/Classes/PHPExcel/Cell/DefaultValueBinder.php on line 82
09:55:11 Add comments
09:55:11 Add rich-text string
09:55:11 Merge cells
09:55:11 Protect cells
09:55:11 Set cell number formats
09:55:11 Set column widths
09:55:11 Set fonts
09:55:11 Set alignments
09:55:11 Set thin black border outline around column
09:55:11 Set thick brown border outline around Total
09:55:11 Set fills
09:55:11 Set style for header row using alternative method
09:55:11 Unprotect a cell
09:55:11 Add a hyperlink to an external website
09:55:11 Add a hyperlink to another cell on a different worksheet within the workbook
09:55:11 Add a drawing to the worksheet
09:55:11 Add a drawing to the worksheet
09:55:11 Add a drawing to the worksheet
09:55:11 Play around with inserting and removing rows and columns
09:55:11 Set header/footer
09:55:11 Set page orientation and size
09:55:11 Rename first worksheet
09:55:11 Create a second Worksheet object
09:55:11 Add some data
09:55:11 Set the worksheet tab color
09:55:11 Set alignments
09:55:11 Set column widths
09:55:11 Set fonts
09:55:11 Add a drawing to the worksheet
09:55:11 Set page orientation and size
09:55:11 Rename second worksheet
09:55:11 Write to CSV format

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Notice: Trying to access array offset on value of type null in /var/www/html/API/class/PHPExcel-1.8/Classes/PHPExcel/Calculation.php on line 3349
09:55:11 File written to 16csv.csv
Call time to write Workbook was 0.0023 seconds
09:55:11 Current memory usage: 2 MB
09:55:11 Read from CSV format
Call time to reload Workbook was 0.0005 seconds
09:55:11 Current memory usage: 2 MB
09:55:11 Write to Excel2007 format

Fatal error: Uncaught Error: Class 'ZipArchive' not found in /var/www/html/API/class/PHPExcel-1.8/Classes/PHPExcel/Writer/Excel2007.php:220 Stack trace: #0 /var/www/html/API/class/PHPExcel-1.8/Examples/16csv.php(77): PHPExcel_Writer_Excel2007->save() #1 {main} thrown in /var/www/html/API/class/PHPExcel-1.8/Classes/PHPExcel/Writer/Excel2007.php on line 220