我是 PHP 新手，正在尝试在 PHP 中为我的移动应用程序构建 RestFull 服务。我用谷歌搜索，发现根据 Stackoverflow 和其他地方的许多人的建议，最好使用 PHP 文章创建 REST API 。
但是在阅读这篇文章时，我像下面这样安排了这段代码，但无法弄清楚给定的最后两个函数，它们应该放在哪里？
PHP对我来说是新语言..所以请帮助我。
class RestUtils
{
public static function processRequest()
{
// get our verb
$request_method = strtolower($_SERVER['REQUEST_METHOD']);
$return_obj = new RestRequest();
// we'll store our data here
$data = array();
switch ($request_method)
{
// gets are easy...
case 'get':
$data = $_GET;
break;
// so are posts
case 'post':
$data = $_POST;
break;
// here's the tricky bit...
case 'put':
// basically, we read a string from PHP's special input location,
// and then parse it out into an array via parse_str... per the PHP docs:
// Parses str as if it were the query string passed via a URL and sets
// variables in the current scope.
parse_str(file_get_contents('php://input'), $put_vars);
$data = $put_vars;
break;
}
// store the method
$return_obj->setMethod($request_method);
// set the raw data, so we can access it if needed (there may be
// other pieces to your requests)
$return_obj->setRequestVars($data);
if(isset($data['data']))
{
// translate the JSON to an Object for use however you want
$return_obj->setData(json_decode($data['data']));
}
return $return_obj;
}
public static function sendResponse($status = 200, $body = '', $content_type = 'text/html')
{
$status_header = 'HTTP/1.1 ' . $status . ' ' . RestUtils::getStatusCodeMessage($status);
// set the status
header($status_header);
// set the content type
header('Content-type: ' . $content_type);
// pages with body are easy
if($body != '')
{
// send the body
echo $body;
exit;
}
// we need to create the body if none is passed
else
{
// create some body messages
$message = '';
// this is purely optional, but makes the pages a little nicer to read
// for your users. Since you won't likely send a lot of different status codes,
// this also shouldn't be too ponderous to maintain
switch($status)
{
case 401:
$message = 'You must be authorized to view this page.';
break;
case 404:
$message = 'The requested URL ' . $_SERVER['REQUEST_URI'] . ' was not found.';
break;
case 500:
$message = 'The server encountered an error processing your request.';
break;
case 501:
$message = 'The requested method is not implemented.';
break;
}
// servers don't always have a signature turned on (this is an apache directive "ServerSignature On")
$signature = ($_SERVER['SERVER_SIGNATURE'] == '') ? $_SERVER['SERVER_SOFTWARE'] . ' Server at ' . $_SERVER['SERVER_NAME'] . ' Port ' . $_SERVER['SERVER_PORT'] : $_SERVER['SERVER_SIGNATURE'];
// this should be templatized in a real-world solution
$body = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>' . $status . ' ' . RestUtils::getStatusCodeMessage($status) . '</title>
</head>
<body>
<h1>' . RestUtils::getStatusCodeMessage($status) . '</h1>
<p>' . $message . '</p>
<hr />
<address>' . $signature . '</address>
</body>
</html>';
echo $body;
exit;
}
}
public static function getStatusCodeMessage($status)
{
// these could be stored in a .ini file and loaded
// via parse_ini_file()... however, this will suffice
// for an example
$codes = Array(
100 => 'Continue',
101 => 'Switching Protocols',
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information',
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content',
300 => 'Multiple Choices',
301 => 'Moved Permanently',
302 => 'Found',
303 => 'See Other',
304 => 'Not Modified',
305 => 'Use Proxy',
306 => '(Unused)',
307 => 'Temporary Redirect',
400 => 'Bad Request',
401 => 'Unauthorized',
402 => 'Payment Required',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required',
408 => 'Request Timeout',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed',
413 => 'Request Entity Too Large',
414 => 'Request-URI Too Long',
415 => 'Unsupported Media Type',
416 => 'Requested Range Not Satisfiable',
417 => 'Expectation Failed',
500 => 'Internal Server Error',
501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Timeout',
505 => 'HTTP Version Not Supported'
);
return (isset($codes[$status])) ? $codes[$status] : '';
}
}
class RestRequest
{
private $request_vars;
private $data;
private $http_accept;
private $method;
public function __construct()
{
$this->request_vars = array();
$this->data = '';
$this->http_accept = (strpos($_SERVER['HTTP_ACCEPT'], 'json')) ? 'json' : 'xml';
$this->method = 'get';
}
public function setData($data)
{
$this->data = $data;
}
public function setMethod($method)
{
$this->method = $method;
}
public function setRequestVars($request_vars)
{
$this->request_vars = $request_vars;
}
public function getData()
{
return $this->data;
}
public function getMethod()
{
return $this->method;
}
public function getHttpAccept()
{
return $this->http_accept;
}
public function getRequestVars()
{
return $this->request_vars;
}
}
/////我无法放置在正确位置的代码段////////////////////
///////////////////////////////////////// ///////////////////////////////////////// ////
$data = RestUtils::processRequest();
switch($data->getMethod)
{
case 'get':
// retrieve a list of users
break;
case 'post':
$user = new User();
$user->setFirstName($data->getData()->first_name); // just for example, this should be done cleaner
// and so on...
$user->save();
break;
// etc, etc, etc...
}
/////////////////////////////////
switch($data->getMethod)
{
// this is a request for all users, not one in particular
case 'get':
$user_list = getUserList(); // assume this returns an array
if($data->getHttpAccept == 'json')
{
RestUtils::sendResponse(200, json_encode($user_list), 'application/json');
}
else if ($data->getHttpAccept == 'xml')
{
// using the XML_SERIALIZER Pear Package
$options = array
(
'indent' => ' ',
'addDecl' => false,
'rootName' => $fc->getAction(),
XML_SERIALIZER_OPTION_RETURN_RESULT => true
);
$serializer = new XML_Serializer($options);
RestUtils::sendResponse(200, $serializer->serialize($user_list), 'application/xml');
}
break;
// new user create
case 'post':
$user = new User();
$user->setFirstName($data->getData()->first_name); // just for example, this should be done cleaner
// and so on...
$user->save();
// just send the new ID as the body
RestUtils::sendResponse(201, $user->getId());
break;
}
/////////////////////////////////////////////////////////////////////////////////////