SQL IN OPERATOR
I use the IN operator because I work with arrays in my SQL statement.
For example:
$city[1] = "'Paris'";
$city[2] = "'London'";
$cityString= implode(", ", $city);
SELECT * FROM Customers
WHERE City IN ($cityString);
But in my code I use the value's of my GET or POST array. But when the array is empty there are no values, so my SQL statement won't work. How can I solve this without if statements and have a list of thousands of SQL statements.