如何使用bind_result与get_result的示例

对我来说，决定性的因素是我是否使用调用查询列*。

bind_result()为此，使用会更好： // Use bind_result() with fetch() $query1 = 'SELECT id, first_name, last_name, username FROM table WHERE id = ?'; get_result()为此，使用会更好： // Use get_result() with fetch_assoc() $query2 = 'SELECT * FROM table WHERE id = ?'; 示例1 $query1使用bind_result() $query1 = 'SELECT id, first_name, last_name, username FROM table WHERE id = ?'; $id = 5;

if($stmt = $mysqli->prepare($query)){ /* Binds variables to prepared statement

    i    corresponding variable has type integer
    d    corresponding variable has type double
    s    corresponding variable has type string
    b    corresponding variable is a blob and will be sent in packets

*/ $stmt->bind_param('i',$id);

/* execute query */ $stmt->execute();

/* Store the result (to get properties) */ $stmt->store_result();

/* Get the number of rows */ $num_of_rows = $stmt->num_rows;

/* Bind the result to variables */ $stmt->bind_result($id, $first_name, $last_name, $username);

while ($stmt->fetch()) { echo 'ID: '.$id.'
'; echo 'First Name: '.$first_name.'
'; echo 'Last Name: '.$last_name.'
'; echo 'Username: '.$username.'

'; }

/* free results */ $stmt->free_result();

/* close statement */ $stmt->close(); }

/* close connection */ $mysqli->close(); 实施例2对于$query2使用get_result() $query2 = 'SELECT * FROM table WHERE id = ?'; $id = 5;

if($stmt = $mysqli->prepare($query)){ /* Binds variables to prepared statement

    i    corresponding variable has type integer
    d    corresponding variable has type double
    s    corresponding variable has type string
    b    corresponding variable is a blob and will be sent in packets

*/ $stmt->bind_param('i',$id);

/* execute query */ $stmt->execute();

/* Get the result */ $result = $stmt->get_result();

/* Get the number of rows */ $num_of_rows = $result->num_rows;

while ($row = $result->fetch_assoc()) { echo 'ID: '.$row['id'].'
'; echo 'First Name: '.$row['first_name'].'
'; echo 'Last Name: '.$row['last_name'].'
'; echo 'Username: '.$row['username'].'

'; }

/* free results */ $stmt->free_result();

/* close statement */ $stmt->close(); }

/* close connection / $mysqli->close(); 正如你所看到的，你不能使用bind_result带。但是，get_result两者均可使用，但bind_result更简单，并且消除了一些麻烦$row['name']。

bind_result（） 优点：

更简单 不用惹 $row['name'] 用途 fetch() 缺点：

不适用于使用 * get_result（） 优点：

适用于所有SQL语句 用途 fetch_assoc() 缺点：

必须搞乱数组变量 $row[] 不那么整齐 需要MySQL本机驱动程序（mysqlnd）来源：stack overflow