“Warning: mysql_query(): supplied argument is not a valid MySQL-Link” - Why?

Question

What\'s wrong with my code? I keep getting this error: Warning: mysql_query(): supplied argument is not a valid MySQL-Link resource in functions.php on line 4 error readin

Answer 1

to find the error you can try putting mysql_error()

$result = mysql_query("SHOW TABLES LIKE '$gn'",$db) or exit( mysql_error() );