PDO数据库用户存在控件

Question

if(isset($_GET['id'])){
    $nome = $_GET['nome'];
    $cognome = $_GET['cognome'];
    $id = $_GET['id'];
    $sql = "UPDATE utenti SET nome = :nome, cognome = :cognome WHERE id = :id";
    $req = $dbh->prepare($sql);
    $req->execute(
        array(
            ":nome" => $nome,
            ":cognome" => $cognome,
            ":id" => $id,
            )
        );
} else {
    $nome = $_GET['nome'];
    $cognome = $_GET['cognome'];
    $sql = "INSERT INTO utenti (nome, cognome) VALUES (:nome, :cognome)";
    $req = $dbh->prepare($sql);
    $req->execute(
        array(
            ":nome" => $nome,
            ":cognome" => $cognome,
            )
        );
}

大家好。我有这个代码在数据库中插入或更新表单的数据。我想要包含一个“if”检查，表明您正在检查数据库中是否存在该用户。我能怎么做？谢谢

Answer 1

试试这个：

/etc/mysql/my.cnf

编辑2：现在应该可以使用^^