// JavaScript (AJAX) 部分
function callPHP() {
    var xhr = new XMLHttpRequest();
    xhr.open("POST", "your_script.php", true);
    xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    
    xhr.onreadystatechange = function() {
        if (xhr.readyState === 4 && xhr.status === 200) {
            console.log(xhr.responseText);
            // 处理返回的数据
            document.getElementById("result").innerHTML = xhr.responseText;
        }
    };
    
    var data = "param1=value1&param2=value2";
    xhr.send(data);
}

// PHP (your_script.php) 部分
<?php
header('Content-Type: application/json');

$param1 = $_POST['param1'] ?? '';
$param2 = $_POST['param2'] ?? '';

// 处理数据
$result = [
    'status' => 'success',
    'data' => [
        'processed_param1' => strtoupper($param1),
        'processed_param2' => $param2 . '_processed'
    ]
];

echo json_encode($result);
?>

async function callPHPWithFetch() {
    try {
        const response = await fetch('your_script.php', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({param1: 'value1', param2: 'value2'})
        });
        
        const data = await response.json();
        console.log(data);
        document.getElementById("result").innerHTML = data.data.processed_param1;
    } catch (error) {
        console.error('Error:', error);
    }
}

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: GET, POST");
header("Access-Control-Allow-Headers: Content-Type");