在PHP中,使用MySQLi或PDO擴(kuò)展來連接和操作MySQL數(shù)據(jù)庫。這里我將分別展示如何使用MySQLi和PDO的fetch
方法獲取數(shù)據(jù)。
使用MySQLi:
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
// 創(chuàng)建連接
$conn = new mysqli($servername, $username, $password, $dbname);
// 檢查連接
if ($conn->connect_error) {
die("連接失敗: " . $conn->connect_error);
}
$sql = "SELECT id, name, email FROM users";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// 輸出每行數(shù)據(jù)
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - Name: " . $row["name"]. " - Email: " . $row["email"]. "<br>";
}
} else {
echo "0 結(jié)果";
}
$conn->close();
使用PDO:
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// 設(shè)置 PDO 錯誤模式為異常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
echo "連接失敗: " . $e->getMessage();
}
$sql = "SELECT id, name, email FROM users";
$stmt = $conn->prepare($sql);
$stmt->execute();
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
if (!empty($result)) {
// 輸出每行數(shù)據(jù)
foreach ($result as $row) {
echo "id: " . $row["id"]. " - Name: " . $row["name"]. " - Email: " . $row["email"]. "<br>";
}
} else {
echo "0 結(jié)果";
}
$conn = null;
以上示例展示了如何使用MySQLi和PDO的fetch
方法從MySQL數(shù)據(jù)庫中獲取數(shù)據(jù)。注意,為了簡潔起見,我沒有在這里展示如何創(chuàng)建和填充數(shù)據(jù)庫表。在實(shí)際應(yīng)用中,你需要先創(chuàng)建一個包含數(shù)據(jù)的表。