PHP 및 SOAP: 도메인 간 액세스 및 보안 정책을 처리하는 방법

// PHP服务端代码
<?php
header('Content-Type: application/json');
$data = array("name" => "John", "age" => 30);
$callback = $_GET['callback'];
echo $callback . '(' . json_encode($data) . ')';
?>

// JS客户端代码
function displayData(data) {
  console.log(data);
}

var script = document.createElement('script');
script.src = 'http://example.com/api?callback=displayData';
document.body.appendChild(script);

// PHP服务端代码
<?php
header('Access-Control-Allow-Origin: http://example.com');
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE');
header('Access-Control-Allow-Headers: Content-Type');
$data = array("name" => "John", "age" => 30);
echo json_encode($data);
?>

// JS客户端代码
var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://example.com/api', true);
xhr.onload = function() {
  if (xhr.status === 200) {
    var data = JSON.parse(xhr.responseText);
    console.log(data);
  }
};
xhr.send();

// PHP服务端代码
<?php
$name = $_POST['name'];
if (!preg_match("/^[a-zA-Z ]*$/", $name)) {
    echo "Invalid name";
} else {
    // 处理合法的name
}
?>

// JS客户端代码
var name = 'John<script>alert("XSS")</script>';
var xhr = new XMLHttpRequest();
xhr.open('POST', 'http://example.com/api', true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send('name=' + encodeURIComponent(name));

// PHP服务端代码
<?php
$key = 'secret_key';
$data = 'sensitive_data';
$encrypted_data = openssl_encrypt($data, 'AES-256-CBC', $key, 0, 'iv');
$decrypted_data = openssl_decrypt($encrypted_data, 'AES-256-CBC', $key, 0, 'iv');
?>

// JS客户端代码
var key = 'secret_key';
var data = 'sensitive_data';
var encryptedData = CryptoJS.AES.encrypt(data, key);
var decryptedData = CryptoJS.AES.decrypt(encryptedData, key);