PHP跨文件传递参数的8种常见方法

// file1.php
<a href="file2.php?id=123&name=John">跳转</a>
// file2.php
$id = $_GET['id'];   // 获取 123
$name = $_GET['name']; // 获取 John

// file1.php
session_start();
$_SESSION['user'] = 'Alice';
// file2.php
session_start();
echo $_SESSION['user']; // 输出 Alice

// file1.php
setcookie("theme", "dark", time() + 86400);
// file2.php
echo $_COOKIE['theme']; // 输出 dark

// config.php
$db_host = 'localhost';
// file1.php
include 'config.php';
echo $db_host; // 输出 localhost

// file1.php
file_put_contents('data.txt', 'Hello World');
// file2.php
$data = file_get_contents('data.txt'); // 读取 Hello World

// file1.php
$pdo = new PDO('mysql:host=localhost;dbname=test', 'user', 'pass');
$pdo->exec("INSERT INTO messages (content) VALUES ('Hello')");
// file2.php
$stmt = $pdo->query("SELECT content FROM messages");
$data = $stmt->fetchAll();

// file1.php
$data = ['name' => 'Bob', 'age' => 30];
file_put_contents('data.dat', serialize($data));
// file2.php
$data = unserialize(file_get_contents('data.dat'));
echo $data['name']; // 输出 Bob

// Config.php
class Config {
    public static $value = 'default';
}
// file1.php
Config::$value = 'new value';
// file2.php
echo Config::$value; // 输出 new value