Binding variable for column name in PHP for Postgresql query

Question

I need to dynamically generate the column name I need to update in Postgresql from PHP. Here\'s the code and the error:

$Col = \"dog_\".$Num.\"_pic\";
$query_par         


        

Answer 1

You can't bind columns names in your query:

$sql = "UPDATE users 
        SET `:dog_col`=:dog_path
        WHERE `username`=:user_id_";

In this case you must use a variable like this:

    $column = 'myColumn';

    $sql = "UPDATE users
            SET $column = :dog_path
            WHERE username = :user_id_";