Warning: file(countries.txt): Failed to open stream: No such file or directory in C:\xampp\htdocs\jv\pdftest1.php on line 10

Warning: foreach() argument must be of type array|object, bool given in C:\xampp\htdocs\jv\pdftest1.php on line 12

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in C:\xampp\htdocs\jv\fpdf.php:526 Stack trace: #0 C:\xampp\htdocs\jv\fpdf.php(526): in_array('helvetica', NULL) #1 C:\xampp\htdocs\jv\pdftest1.php(94): FPDF->SetFont('helvetica', '', 14) #2 {main} thrown in C:\xampp\htdocs\jv\fpdf.php on line 526