09:54:19 Create new PHPExcel object
09:54:19 Set document properties
09:54:19 Add some data
09:54:19 Add comments
09:54:19 Add rich-text string
09:54:19 Merge cells
09:54:19 Protect cells
09:54:19 Set cell number formats
09:54:19 Set column widths
09:54:19 Set fonts
09:54:19 Set alignments
09:54:19 Set thin black border outline around column
09:54:19 Set thick brown border outline around Total
09:54:19 Set fills
09:54:19 Set style for header row using alternative method
09:54:19 Unprotect a cell
09:54:19 Add a hyperlink to an external website
09:54:19 Add a hyperlink to another cell on a different worksheet within the workbook
09:54:19 Add a drawing to the worksheet
09:54:19 Add a drawing to the worksheet
09:54:19 Add a drawing to the worksheet
09:54:19 Play around with inserting and removing rows and columns
09:54:19 Set header/footer
09:54:19 Set page orientation and size
09:54:19 Rename first worksheet
09:54:19 Create a second Worksheet object
09:54:19 Add some data
09:54:19 Set the worksheet tab color
09:54:19 Set alignments
09:54:19 Set column widths
09:54:19 Set fonts
09:54:19 Add a drawing to the worksheet
09:54:19 Set page orientation and size
09:54:19 Rename second worksheet
09:54:19 Write to CSV format

Fatal error: Uncaught Error: Call to undefined function mb_strtolower() in /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Style/NumberFormat.php:448 Stack trace: #0 [internal function]: PHPExcel_Style_NumberFormat::setLowercaseCallback(Array) #1 /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Style/NumberFormat.php(464): preg_replace_callback('/(?:^|")([^"]*)...', Array, 'd-mmm-yy') #2 /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Style/NumberFormat.php(647): PHPExcel_Style_NumberFormat::formatAsDate(46302, 'd-mmm-yy') #3 /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Worksheet.php(2502): PHPExcel_Style_NumberFormat::toFormattedString(46302, 'd-mmm-yy') #4 /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/CSV.php(142): PHPExcel_Worksheet->rangeToArray('A1:E1', '', true) #5 /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Examples/16csv.php(50): PHPExcel_Writer_CSV->save(' in /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Style/NumberFormat.php on line 448