Notice: Undefined variable: spreadsheetC in /home/seo2014/public_html/Z_michael_files/WEB MAKING/Usefull Templete/Usefull Templete36 - Convert excel date to mysql date/Convert excel date to mysql date.php on line 3

Fatal error: Uncaught Error: Call to a member function getActiveSheet() on null in /home/seo2014/public_html/Z_michael_files/WEB MAKING/Usefull Templete/Usefull Templete36 - Convert excel date to mysql date/Convert excel date to mysql date.php:3 Stack trace: #0 {main} thrown in /home/seo2014/public_html/Z_michael_files/WEB MAKING/Usefull Templete/Usefull Templete36 - Convert excel date to mysql date/Convert excel date to mysql date.php on line 3