"return one value from database with mysql php pdo" Answer’s


You could create a function for this and call that function each time you need a single value. For security reasons, avoid concatenating strings to form an SQL query. Instead, use prepared statements for the values and hardcode everything else in the SQL string. In order to get a certain column, just explicitly list it in your query. a fetchColumn() method also comes in handy for fetching a single value from the query

function getSingleValue($conn, $sql, $parameters)
    $q = $conn->prepare($sql);
    return $q->fetchColumn();

Then you can simply do:

$name = getSingleValue($conn, "SELECT name FROM login_users WHERE id=?", [$userid]); 

and it will get you the desired value.

So you need to create that function just once, but can reuse it for different queries.

This answer has been community edited addressing security concerns

Wednesday, March 31, 2021
answered 11 Months ago
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