如何添加更多要搜索的内容

Question

I'm trying to make search script on php. For now it's only searching for serialkey in database, but I want to add more.

$search = $conn->prepare("SELECT `id`, `serialkey`, `discordid`, `orderid`, `date` FROM `serials` WHERE `serialkey` LIKE ?");
$search->execute(array("%$q%"));

I tried to use

$search = $conn->prepare("SELECT `id`, `serialkey`, `discordid`, `orderid`, `date` FROM `serials` WHERE `serialkey` LIKE ? or `discordid` LIKE ?");

But it didn't work, just getting error

Invalid parameter number: number of bound variables does not match number of tokens

Answer 1

Even if you want to compare multiple columns against the same value, you must bind it the number of times you have used the placeholder. If you have used two placeholders you need to bind the same value twice.

$search = $conn->prepare("SELECT `id`, `serialkey`, `discordid`, `orderid`, `date` 
    FROM `serials` 
    WHERE `serialkey` LIKE ? or `discordid` LIKE ?");
$search->execute(["%$q%", "%$q%"]);