Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/banner.php:1) in /var/www/html/banner.php on line 2

Fatal error: Uncaught Error: Call to undefined function imagecreatefrompng() in /var/www/html/banner.php:9 Stack trace: #0 {main} thrown in /var/www/html/banner.php on line 9