Мое приложение имеет настройки production или development которые я могу переключить. При настройке сервера я устанавливаю этот флаг в Applications > Mamp > Conf > Apache > httpd.conf . Его цель – предоставить моему локальному каталогу API псевдоним сервера. Он также определяет корень документа и т. Д.
Listen 44447 <VirtualHost *:44447> DocumentRoot "/Users/user/Desktop/PushChatServer/api" ServerName 192.168.1.5:44447 ServerAlias pushchat.local CustomLog "/Users/user/Desktop/PushChatServer/log/apache_access.log" combined ErrorLog "/Users/user/Desktop/PushChatServer/log/apache_error.log" SetEnv APPLICATION_ENV development php_flag magic_quotes_gpc off <Directory "/Users/user/Desktop/PushChatServer/api"> Options Indexes MultiViews FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost>
Моя цель – установить глобальную переменную в моем api и передать ее в другой файл. Файл php, который использует мое приложение, называется api.php и я бы хотел использовать глобальную переменную с именем $Var1 . Я установил $Var1 как это в api.php
//In api.php global $Var1; $Var1 = '1';
Когда я пытаюсь это назвать, не получается. Я называю это так:
<?php //Checks for warnings error_reporting(E_ALL); ini_set("display_errors", 1); error_reporting(E_ALL|E_STRICT); ini_set('display_errors', 'on'); include 'api.php' echo "Var1"; ?>
Дело в том, что вывод не выводится в браузере. Теперь я понимаю блок кода в api.php который мешает глобальной переменной. Я все еще не уверен, почему. Когда я удаляю этот блок кода из api.php глобальная переменная успешно отображается в Test.php . Как я могу сохранить блок кода и успешно отображать глобальное значение в Test.php ?
try { // Are we running in development or production mode? You can easily switch // between these two in the Apache VirtualHost configuration. if (!defined('APPLICATION_ENV')) define('APPLICATION_ENV', getenv('APPLICATION_ENV') ? getenv('APPLICATION_ENV') : 'production'); // In development mode, we show all errors because we obviously want to // know about them. We don't do this in production mode because that might // expose critical details of our app or our database. Critical PHP errors // will still be logged in the PHP and Apache error logs, so it's always // a good idea to keep an eye on them. if (APPLICATION_ENV == 'development') { error_reporting(E_ALL|E_STRICT); ini_set('display_errors', 'on'); } else { error_reporting(0); ini_set('display_errors', 'off'); } // Load the config file. I prefer to keep all configuration settings in a // separate file so you don't have to mess around in the main code if you // just want to change some settings. require_once 'api_config.php'; $config = $config[APPLICATION_ENV]; // In development mode, we fake a delay that makes testing more realistic. // You're probably running this on a fast local server but in production // mode people will be using it on a mobile device over a slow connection. if (APPLICATION_ENV == 'development') sleep(0); // To keep the code clean, I put the API into its own class. Create an // instance of that class and let it handle the request. $api = new API($config); $api->handleCommand(); echo "OK" . PHP_EOL; } catch (Exception $e) { // The code throws an exception when something goes horribly wrong; eg // no connection to the database could be made. In development mode, we // show these exception messages. In production mode, we simply return a // "500 Server Error" message. if (APPLICATION_ENV == 'development') var_dump($e); else exitWithHttpError(500); } //////////////////////////////////////////////////////////////////////////////// function exitWithHttpError($error_code, $message = '') { switch ($error_code) { case 400: header("HTTP/1.0 400 Bad Request"); break; case 403: header("HTTP/1.0 403 Forbidden"); break; case 404: header("HTTP/1.0 404 Not Found"); break; case 500: header("HTTP/1.0 500 Server Error"); break; } header('Content-Type: text/plain'); if ($message != '') header('X-Error-Description: ' . $message); exit; } function isValidUtf8String($string, $maxLength, $allowNewlines = false) { if (empty($string) || strlen($string) > $maxLength) return false; if (mb_check_encoding($string, 'UTF-8') === false) return false; // Don't allow control characters, except possibly newlines for ($t = 0; $t < strlen($string); $t++) { $ord = ord($string{$t}); if ($allowNewlines && ($ord == 10 || $ord == 13)) continue; if ($ord < 32) return false; } return true; } function truncateUtf8($string, $maxLength) { $origString = $string; $origLength = $maxLength; while (strlen($string) > $origLength) { $string = mb_substr($origString, 0, $maxLength, 'utf-8'); $maxLength--; } return $string; }
ОБНОВИТЬ
Полный исходный код api.php. Моя цель – объявить глобальную переменную и передать ее долгое время, используя инструкцию require для нового файла. Я могу сделать это, только если я удалю весь блок try в начале этого файла, и мне нужно знать, почему.
<?php global $Var1; $Var1 = '1'; // This is the server API for the PushChat iPhone app. To use the API, the app // sends an HTTP POST request to our URL. The POST data contains a field "cmd" // that indicates what API command should be executed. try { // Are we running in development or production mode? You can easily switch // between these two in the Apache VirtualHost configuration. if (!defined('APPLICATION_ENV')) define('APPLICATION_ENV', getenv('APPLICATION_ENV') ? getenv('APPLICATION_ENV') : 'production'); // In development mode, we show all errors because we obviously want to // know about them. We don't do this in production mode because that might // expose critical details of our app or our database. Critical PHP errors // will still be logged in the PHP and Apache error logs, so it's always // a good idea to keep an eye on them. if (APPLICATION_ENV == 'development') { error_reporting(E_ALL|E_STRICT); ini_set('display_errors', 'on'); } else { error_reporting(0); ini_set('display_errors', 'off'); } // Load the config file. I prefer to keep all configuration settings in a // separate file so you don't have to mess around in the main code if you // just want to change some settings. require_once 'api_config.php'; $config = $config[APPLICATION_ENV]; // In development mode, we fake a delay that makes testing more realistic. // You're probably running this on a fast local server but in production // mode people will be using it on a mobile device over a slow connection. if (APPLICATION_ENV == 'development') sleep(0); // To keep the code clean, I put the API into its own class. Create an // instance of that class and let it handle the request. $api = new API($config); $api->handleCommand(); echo "OK" . PHP_EOL; } catch (Exception $e) { // The code throws an exception when something goes horribly wrong; eg // no connection to the database could be made. In development mode, we // show these exception messages. In production mode, we simply return a // "500 Server Error" message. if (APPLICATION_ENV == 'development') var_dump($e); else exitWithHttpError(500); } //////////////////////////////////////////////////////////////////////////////// function exitWithHttpError($error_code, $message = '') { switch ($error_code) { case 400: header("HTTP/1.0 400 Bad Request"); break; case 403: header("HTTP/1.0 403 Forbidden"); break; case 404: header("HTTP/1.0 404 Not Found"); break; case 500: header("HTTP/1.0 500 Server Error"); break; } header('Content-Type: text/plain'); if ($message != '') header('X-Error-Description: ' . $message); exit; } function isValidUtf8String($string, $maxLength, $allowNewlines = false) { if (empty($string) || strlen($string) > $maxLength) return false; if (mb_check_encoding($string, 'UTF-8') === false) return false; // Don't allow control characters, except possibly newlines for ($t = 0; $t < strlen($string); $t++) { $ord = ord($string{$t}); if ($allowNewlines && ($ord == 10 || $ord == 13)) continue; if ($ord < 32) return false; } return true; } function truncateUtf8($string, $maxLength) { $origString = $string; $origLength = $maxLength; while (strlen($string) > $origLength) { $string = mb_substr($origString, 0, $maxLength, 'utf-8'); $maxLength--; } return $string; } //////////////////////////////////////////////////////////////////////////////// class API { // Because the payload only allows for 256 bytes and there is some overhead // we limit the message text to 190 characters. const MAX_MESSAGE_LENGTH = 190; private $pdo; function __construct($config) { // Create a connection to the database. $this->pdo = new PDO( 'mysql:host=' . $config['db']['host'] . ';dbname=' . $config['db']['dbname'], $config['db']['username'], $config['db']['password'], array()); // If there is an error executing database queries, we want PDO to // throw an exception. Our exception handler will then exit the script // with a "500 Server Error" message. $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // We want the database to handle all strings as UTF-8. $this->pdo->query('SET NAMES utf8'); } function handleCommand() { // Figure out which command the client sent and let the corresponding // method handle it. If the command is unknown, then exit with an error // message. if (isset($_POST['cmd'])) { switch (trim($_POST['cmd'])) { case 'join': $this->handleJoin(); return; case 'leave': $this->handleLeave(); return; case 'update': $this->handleUpdate(); return; case 'message': $this->handleMessage(); return; } } exitWithHttpError(400, 'Unknown command'); } // The "join" API command registers a user to receive notifications that // are sent in a specific "chat room". Each chat room is identified by a // secret code. All the users who register with the same secret code can // see each other's messages. // // This command takes the following POST parameters: // // - user_Id: A unique identifier. Must be a string of 40 hexadecimal characters. // - token: The device's device token. Must be a string of 64 hexadecimal // characters, or "0" if no token is available yet. // - name: The nickname of the user. Must be a UTF-8 string of maximum 255 // bytes. Only the first 20 bytes are actually shown in the push // notifications. // - code: The secret code that identifies the chat room. Must be a UTF-8 // string of maximum 255 bytes. // function handleJoin() { //function getUserId; $userId = $this->getUserId(); $token = $this->getDeviceToken(true); $name = $this->getString('name', 255); $code = $this->getString('code', 255); // When the client sends a "join" command, we add a new record to the // active_users table. We identify the client by the user_id that it // provides. When the client sends a "leave" command, we delete its // record from the active_users table. // It is theoretically possible that a client sends a "join" command // while its user_id is still present in active_users (because it did not // send a "leave" command). In that case, we simply remove the old // record first and then insert the new one. $this->pdo->beginTransaction(); $stmt = $this->pdo->prepare('DELETE FROM active_users WHERE user_Id = ?'); $stmt->execute(array($userId)); $stmt = $this->pdo->prepare('INSERT INTO active_users (user_Id, device_token, nickname, secret_code, ip_address) VALUES (?, ?, ?, ?, ?)'); $stmt->execute(array($userId, $token, $name, $code, $_SERVER['REMOTE_ADDR'])); $this->pdo->commit(); } // The "leave" API command removes a user from a chat room. That user will // no longer receive push notifications for messages sent to that room. // // This command takes the following POST parameters: // // - user_id: A unique identifier. Must be a string of 40 hexadecimal characters. // function handleLeave() { $userId = $this->getUserId(); $stmt = $this->pdo->prepare('DELETE FROM active_users WHERE user_Id = ?'); $stmt->execute(array($userId)); } // The "update" API command gives a user a new device token. // // This command takes the following POST parameters: // // - user_id: A unique identifier. Must be a string of 40 hexadecimal characters. // - token: The device's device token. Must be a string of 64 hexadecimal // characters. // function handleUpdate() { $userId = $this->getUserId(); $token = $this->getDeviceToken(false); $stmt = $this->pdo->prepare('UPDATE active_users SET device_token = ? WHERE user_Id = ?'); $stmt->execute(array($token, $userId)); } // The "message" API command sends a message to all users who are registered // with the same secret code as the sender of the message. // // This command takes the following POST parameters: // // - user_id: A unique identifier. Must be a string of 40 hexadecimal characters. // - text: The message text. Must be a UTF-8 string of maximum 190 bytes. // function handleMessage() { $userId = $this->getUserId(); /*$text = $this->getString('text', self::MAX_MESSAGE_LENGTH, true);*/ // First, we get the record for the sender of the message from the // active_users table. That gives us the nickname, device token, and // secret code for that user. $stmt = $this->pdo->prepare('SELECT * FROM active_users WHERE user_Id = ? LIMIT 1'); $stmt->execute(array($userId)); $user = $stmt->fetch(PDO::FETCH_OBJ); if ($user !== false) { // Put the sender's name and the message text into the JSON payload // for the push notification. $payload = $this->makePayload($user->nickname/*, $text*/); // Find the device tokens for all other users who are registered // for this secret code. We exclude the device token of the sender // of the message, so he will not get a push notification. We also // exclude users who have not submitted a valid device token yet. $stmt = $this->pdo->prepare("SELECT device_token FROM active_users WHERE secret_code = ? AND device_token <> ? AND device_token <> '0'"); $stmt->execute(array($user->secret_code, $user->device_token)); $tokens = $stmt->fetchAll(PDO::FETCH_COLUMN); // Send out a push notification to each of these devices. foreach ($tokens as $token) { $this->addPushNotification($token, $payload); } } } // Retrieves the user identifier from the POST data. If the user_id does not // appear to be valid, the script exits with an error message. function getUserId() { if (!isset($_POST['user_id'])) exitWithHttpError(400, 'Missing user_id'); $userId = trim(urldecode($_POST['user_id'])); if (!$this->isValidUserId($userId)) exitWithHttpError(400, 'Invalid user_id'); return $userId; } // Checks whether the format of the user identifier is correct (40 hex // characters or 32 for the simulator). function isValidUserId($userId) { if (strlen($userId) != 40 && strlen($userId) != 32) // 32 for simulator return false; if (preg_match("/^[0-9a-fA-F]+$/", $userId) == 0) return false; return true; } // Retrieves the device token from the POST data. If the token does not // appear to be valid, the script exits with an error message. function getDeviceToken($mayBeEmpty = false) { if (!isset($_POST['token'])) exitWithHttpError(400, 'Missing device token'); $token = trim($_POST['token']); // The "join" command allows a token value of "0" to be specified, // which is necessary in case the client did not yet obtain a device // token at that point. We allow such clients to join, but they will // not receive any notifications until they provide a valid token // using the "update" command. if ($mayBeEmpty && $token == "0") return $token; if (!$this->isValidDeviceToken($token)) exitWithHttpError(400, 'Invalid device token'); return $token; } // Checks whether the format of the device token is correct (64 hexadecimal // characters). Note: we have no means to verify whether the device token // was really issued by APNS and corresponds to an actual device. function isValidDeviceToken($deviceToken) { if (strlen($deviceToken) != 64) return false; if (preg_match("/^[0-9a-fA-F]{64}$/", $deviceToken) == 0) return false; return true; } // Looks in the POST data for a field with the given name. If the field // is not a valid UTF-8 string, or it is too long, the script exits with // an error message. function getString($name, $maxLength, $allowNewlines = false) { if (!isset($_POST[$name])) exitWithHttpError(400, "Missing $name"); $string = trim($_POST[$name]); if (!isValidUtf8String($string, $maxLength, $allowNewlines)) exitWithHttpError(400, "Invalid $name"); return $string; } // Creates the JSON payload for the push notification message. The "alert" // text has the following format: "sender_name: message_text". Recipients // can obtain the name of the sender by parsing the alert text up to the // first colon followed by a space. function makePayload($senderName, $text) { // Convert the nickname of the sender to JSON and truncate to a maximum // length of 20 bytes (which may be less than 20 characters). $nameJson = $this->jsonEncode($senderName); $nameJson = truncateUtf8($nameJson, 20); // Convert and truncate the message text $textJson = $this->jsonEncode($text); $textJson = truncateUtf8($textJson, self::MAX_MESSAGE_LENGTH); // Combine everything into a JSON string $payload = '{"aps":{"alert":"' . $nameJson . ': ' . $textJson . '","sound":"beep.caf"}}'; return $payload; } // We don't use PHP's built-in json_encode() function because it converts // UTF-8 characters to \uxxxx. That eats up 6 characters in the payload for // no good reason, as JSON already supports UTF-8 just fine. function jsonEncode($text) { static $from = array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'); static $to = array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'); return str_replace($from, $to, $text); } // Adds a push notification to the push queue. The notification will not // be sent immediately. The server runs a separate script, push.php, which // periodically checks for new entries in this database table and sends // them to the APNS servers. function addPushNotification($deviceToken, $payload) { // Payloads have a maximum size of 256 bytes. If the payload is too // large (which shouldn't happen), we won't send this notification. if (strlen($payload) <= 256) { $stmt = $this->pdo->prepare('INSERT INTO push_queue (device_token, payload, time_queued) VALUES (?, ?, NOW())'); $stmt->execute(array($deviceToken, $payload)); } } } ?>