PHP语言调用mySQL数据库

可以使用PHP内置的MySQLi或PDO扩展来连接和操作MySQL数据库。例如，使用MySQLi扩展可以使用以下代码连接数据库：

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = mysqli_connect($servername, $username, $password, $dbname);

// 检查连接是否成功
if (!$conn) {
die("连接失败: " . mysqli_connect_error());
}

// 执行SQL查询
$sql = "SELECT * FROM myTable";
$result = mysqli_query($conn, $sql);

// 处理查询结果
if (mysqli_num_rows($result) > 0) {
while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["id"]. " - Name: " . $row["name"]. " - Email: " . $row["email"]. "<br>";
}
} else {
echo "0 结果";
}

// 关闭连接
mysqli_close($conn);