php访问次数统计

<?php
// 数据库连接信息
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

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

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

// 查询当前访问次数
$sql = "SELECT count FROM visit_count WHERE id = 1";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        $count = $row["count"];
    }
} else {
    $count = 0;
}

// 更新访问次数
$count++;
$sql = "UPDATE visit_count SET count = $count WHERE id = 1";
if ($conn->query($sql) === TRUE) {
    echo "访问次数更新成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

// 关闭连接
$conn->close();
?>