挂号系统php源码

<?php
// 数据库连接示例
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "hospital";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
?>

<?php
// 插入数据示例
$sql = "INSERT INTO appointments (patient_id, doctor_id, appointment_time)
VALUES ('$patient_id', '$doctor_id', '$appointment_time')";

if ($conn->query($sql) === TRUE) {
    echo "挂号成功";
} else {
    echo "挂号失败: " . $conn->error;
}
?>

<?php
// 使用索引优化查询示例
$sql = "SELECT * FROM appointments WHERE doctor_id = '$doctor_id' ORDER BY appointment_time ASC";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "预约时间: " . $row["appointment_time"]. "<br>";
    }
} else {
    echo "没有找到预约信息";
}
?>