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Question

我制作了这个示例代码：

$db = new mysqli("localhost","root","password","xxx");

$statement = $db->prepare("SELECT name, password FROM persons WHERE name=? LIMIT 1");

$statement->bind_param('s', "kevin");

$statement->execute();

if($statement->num_rows){

$statement->bind_result($dbname, $dbpassword);

$statement->free_result();

};

echo $dbname;
echo $dbpass;

如何直接使用/ get $ dbname和$ dbpassword而不使用类似的东西：

while($statement->fetch()){
    echo $dbname;
}

我想直接使用$ dbname和dbpassword。 什么是最好的方法？我做错了什么。

Answer 1

我找到了答案：

我需要存储结果（存储结果（获取属性））

我需要获取结果（从准备好的语句中获取结果到绑定变量中）很好地没有while循环。

$db = new mysqli("localhost","root","password","xxx");

$statement = $db->prepare("SELECT name, password FROM persons WHERE name=? LIMIT 1");

$statement->bind_param('s', "kevin");

$statement->execute();

$statement->store_result(); // this is what I was missing

if($statement->num_rows){

    $statement->bind_result($dbname, $dbpassword);

    $statement->fetch(); // this is what I was missing

    $statement->free_result();

    echo $dbname;

    echo $dbpass;

};