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Warning: Undefined variable $con in /home/sahyogtr/public_html/p-detail.php on line 3

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/sahyogtr/public_html/p-detail.php:3 Stack trace: #0 /home/sahyogtr/public_html/p-detail.php(3): mysqli_query(NULL, 'select * from p...') #1 {main} thrown in /home/sahyogtr/public_html/p-detail.php on line 3