好的,我有一个问题。我需要检查用户是否已经存在,但现在的问题是我需要输入if()
我无法提取,因为我已经关闭但是如果我没有关闭则会出现错误因为不能运行2个语句。所以我想如果有人可以帮助我?我有其余的代码,但我只在这里给出代码。
这是我的代码:
$result = $mysqli->prepare("SELECT username FROM user WHERE username=?");
$result->bind_param("s", $username);
$result->execute();
$result->bind_result($username);
$result->close();
if (){
$register = $mysqli->prepare("INSERT INTO user
(username, password, email, rr, rank)
VALUES (?, ?, ?, ?, ?)");
$register->bind_param("sssii", $username, $kode, $email, $rr, $rank);
$register->execute();
$register->close();
} else {
echo "User already exists!";
}
答案 0 :(得分:0)
更新:更多逻辑陈述
$result = $mysqli->prepare("SELECT username FROM user WHERE username=?");
$result->bind_param("s", $username);
$result->execute();
$found = $result->fetch();
$result->close();
if ($found){
echo "User already exists!";
} else {
$register = $mysqli->prepare("INSERT INTO user
(username, password, email, rr, rank)
VALUES (?, ?, ?, ?, ?)");
$register->bind_param("sssii", $username, $kode, $email, $rr, $rank);
$register->execute();
$register->close();
}