Notice: Undefined variable: sql in C:\xampp\htdocs\invoicing\viewinvoice.php on line 304
Warning: mysqli::query(): Empty query in C:\xampp\htdocs\invoicing\viewinvoice.php on line 304
Fatal error: Uncaught Error: Call to a member function free() on boolean in C:\xampp\htdocs\invoicing\viewinvoice.php:322
Stack trace:
#0 {main}
thrown in C:\xampp\htdocs\invoicing\viewinvoice.php on line 322