How to insert an actual NULL value into a nullable column?

Question

function save($gmt, $name, $address, $phone, $remark)
{
    $query= \"INSERT INTO `user` (`gmt`, `name`, `address`, `phone`, `remark`) VALUES (\'$gmt\', \'$name\', \         


        

Answer 1

Using ternary operator, you can also use this

$add = ($address == '' ? NULL : $address);
$phn = ($phone == '' ? NULL : $phone);
$rmk = ($remark == '' ? NULL : $remark);