PHP headers_sent函数代码示例

 public static function start($lifetime = 0, $path = '/', $domain = NULL)
 {
     if (!self::$_initialized) {
         if (!is_object(Symphony::Database()) || !Symphony::Database()->connected()) {
             return false;
         }
         $cache = Cache::instance()->read('_session_config');
         if (is_null($cache) || $cache === false) {
             self::create();
             Cache::instance()->write('_session_config', true);
         }
         if (!session_id()) {
             ini_set('session.save_handler', 'user');
             ini_set('session.gc_maxlifetime', $lifetime);
             ini_set('session.gc_probability', '1');
             ini_set('session.gc_divisor', '3');
         }
         session_set_save_handler(array('Session', 'open'), array('Session', 'close'), array('Session', 'read'), array('Session', 'write'), array('Session', 'destroy'), array('Session', 'gc'));
         session_set_cookie_params($lifetime, $path, $domain ? $domain : self::getDomain(), false, false);
         if (strlen(session_id()) == 0) {
             if (headers_sent()) {
                 throw new Exception('Headers already sent. Cannot start session.');
             }
             session_start();
         }
         self::$_initialized = true;
     }
     return session_id();
 }

 /**
  * @ignore
  * @param array $options
  */
 public function prepareEnvironment($options = array())
 {
     if (empty($options['skipErrorHandler'])) {
         set_error_handler(array('Ip\\Internal\\ErrorHandler', 'ipErrorHandler'));
     }
     if (empty($options['skipError'])) {
         if (ipConfig()->showErrors()) {
             error_reporting(E_ALL | E_STRICT);
             ini_set('display_errors', '1');
         } else {
             ini_set('display_errors', '0');
         }
     }
     if (empty($options['skipSession'])) {
         if (session_id() == '' && !headers_sent()) {
             //if session hasn't been started yet
             session_name(ipConfig()->get('sessionName'));
             if (!ipConfig()->get('disableHttpOnlySetting')) {
                 ini_set('session.cookie_httponly', 1);
             }
             session_start();
         }
     }
     if (empty($options['skipEncoding'])) {
         mb_internal_encoding(ipConfig()->get('charset'));
     }
     if (empty($options['skipTimezone'])) {
         date_default_timezone_set(ipConfig()->get('timezone'));
         //PHP 5 requires timezone to be set.
     }
 }

 public static function exceptionHandle(Exception $exception)
 {
     if (DEBUG_MODE) {
         //直接输出调试信息
         echo nl2br($exception->__toString());
         echo '<hr /><p>Router:</p><pre>';
         print_r(Singleton::getInstance('Router'));
         echo '</pre>';
     } else {
         $code = $exception->getCode();
         $message = nl2br($exception->getMessage());
         /*
                     如果错误码"可能为"合法的http状态码则尝试设置,
                     setStatus()方法会忽略非法的http状态码. */
         if ($code >= 400 && $code <= 505 && !headers_sent()) {
             ResponseModule::setStatus($code);
         }
         $var_list = array('message' => $message, 'code' => $code, 'file' => $exception->getFile(), 'url' => Singleton::getInstance('Router')->getUrl());
         if ($error_file = self::_getErrorFilePath($code)) {
             Lugit::$view = new View($var_list);
             Lugit::$view->render($error_file);
         } else {
             echo 'No error page is found.<pre>';
             print_r($var_list);
             echo '</pre>';
         }
     }
     exit;
 }

 /**
  * Display the given exception to the user.
  *
  * @param   object  $exception
  * @return  void
  */
 public function render(Exception $error)
 {
     if (!headers_sent()) {
         header('HTTP/1.1 500 Internal Server Error');
     }
     $response = 'Error: ' . $error->getCode() . ' - ' . $error->getMessage() . "\n\n";
     if ($this->debug) {
         $backtrace = $error->getTrace();
         if (is_array($backtrace)) {
             $backtrace = array_reverse($backtrace);
             for ($i = count($backtrace) - 1; $i >= 0; $i--) {
                 if (isset($backtrace[$i]['class'])) {
                     $response .= "\n[{$i}] " . sprintf("%s %s %s()", $backtrace[$i]['class'], $backtrace[$i]['type'], $backtrace[$i]['function']);
                 } else {
                     $response .= "\n[{$i}] " . sprintf("%s()", $backtrace[$i]['function']);
                 }
                 if (isset($backtrace[$i]['file'])) {
                     $response .= sprintf(' @ %s:%d', str_replace(PATH_ROOT, '', $backtrace[$i]['file']), $backtrace[$i]['line']);
                 }
             }
         }
     }
     echo php_sapi_name() == 'cli' ? $response : nl2br($response);
     exit;
 }

 public function redirect($uri = null, array $params = [])
 {
     if (headers_sent()) {
         Exception::toss('Cannot redirect to "%s" from the view because output has already started.', $uri);
     }
     (new RequestUri($this->format($uri, $params)))->redirect();
 }

 public function preprocess()
 {
     if (!headers_sent()) {
         header('Location: ../OpenBookFinancingV2/ObfWeeklyReportV2.php');
     }
     return false;
 }

 function init($dir = null)
 {
     if ($dir != null) {
         $this->setdir($dir);
     }
     $this->group('settings');
     $this->group('global');
     $this->group('modules');
     $this->group('custom');
     @ini_set('default_charset', '');
     if (!headers_sent()) {
         viscacha_header('Content-type: text/html; charset=' . $this->phrase('charset'));
     }
     global $slog;
     if (isset($slog) && is_object($slog) && method_exists($slog, 'setlang')) {
         $slog->setlang($this->phrase('fallback_no_username'), $this->phrase('timezone_summer'));
     }
     global $config, $breadcrumb;
     if (isset($breadcrumb)) {
         $isforum = array('addreply', 'attachments', 'edit', 'forum', 'manageforum', 'managetopic', 'misc', 'newtopic', 'pdf', 'search', 'showforum', 'showtopic');
         if ($config['indexpage'] != 'forum' && in_array(SCRIPTNAME, $isforum)) {
             $breadcrumb->Add($this->phrase('forumname'), iif(SCRIPTNAME != 'forum', 'forum.php'));
         }
     }
 }

function espresso_ical()
{
    $name = $_REQUEST['event_summary'] . ".ics";
    $output = "BEGIN:VCALENDAR\n" . "PRODID:-//xyz Corp//NONSGML PDA Calendar Version 1.0//EN\n" . "VERSION:2.0\n" . "BEGIN:VEVENT\n" . "DTSTAMP:" . $_REQUEST['currentyear'] . $_REQUEST['currentmonth'] . $_REQUEST['currentday'] . "T" . $_REQUEST['currenttime'] . "\n" . "UID:" . $_REQUEST['attendee_id'] . "@" . $_REQUEST['event_id'] . "\n" . "ORGANIZER:MAILTO:" . $_REQUEST['contact'] . "\n" . "DTSTART:" . $_REQUEST['startyear'] . $_REQUEST['startmonth'] . $_REQUEST['startday'] . "T" . $_REQUEST['starttime'] . "\n" . "DTEND:" . $_REQUEST['endyear'] . $_REQUEST['endmonth'] . $_REQUEST['endday'] . "T" . $_REQUEST['endtime'] . "\n" . "STATUS:CONFIRMED\n" . "CATEGORIES:" . $_REQUEST['event_categories'] . "\n" . "SUMMARY:" . $_REQUEST['event_summary'] . "\n" . "DESCRIPTION:" . $_REQUEST['event_description'] . "\n" . "END:VEVENT\n" . "END:VCALENDAR";
    if (ob_get_length()) {
        echo 'Some data has already been output, can\'t send iCal file';
    }
    header('Content-Type: application/x-download');
    if (headers_sent()) {
        echo 'Some data has already been output, can\'t send iCal file';
    }
    header('Content-Length: ' . strlen($output));
    header('Content-Disposition: attachment; filename="' . $name . '"');
    header('Cache-Control: private, max-age=0, must-revalidate');
    header('Pragma: public');
    header('Content-Type: application/octet-stream');
    header('Content-Type: application/force-download');
    header('Content-type: application/pdf');
    header("Cache-Control: no-cache, must-revalidate");
    // HTTP/1.1
    header("Content-Transfer-Encoding: binary");
    header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
    // Date in the past
    ini_set('zlib.output_compression', '0');
    echo $output;
    die;
}

 public function redirect()
 {
     if (!headers_sent()) {
         header('Content-Type: text/html; charset=UTF-8');
     }
     return parent::redirect();
 }

 /**
  * Override __toString() to send HTTP Content-Type header
  *
  * @return string
  */
 public function __toString()
 {
     if (!headers_sent()) {
         header('Content-Type: text/xml; charset=' . strtolower($this->getEncoding()));
     }
     return parent::__toString();
 }

 public function download()
 {
     $file = DIR_LOGS . $this->config->get('config_error_filename');
     clearstatcache();
     if (file_exists($file) && is_file($file)) {
         if (!headers_sent()) {
             if (filesize($file) > 0) {
                 header('Content-Type: application/octet-stream');
                 header('Content-Description: File Transfer');
                 header('Content-Disposition: attachment; filename=' . str_replace(' ', '_', $this->config->get('config_name')) . '_' . date('Y-m-d_H-i-s', time()) . '_error.log');
                 header('Content-Transfer-Encoding: binary');
                 header('Expires: 0');
                 header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
                 header('Pragma: public');
                 header('Content-Length: ' . filesize($file));
                 readfile($file, 'rb');
                 exit;
             }
         } else {
             exit('Error: Headers already sent out!');
         }
     } else {
         $this->redirect($this->url->link('tool/error_log', 'token=' . $this->session->data['token'], 'SSL'));
     }
 }

 /**
  * Output object as JSON and set appropriate headers
  * @param mixed $object
  */
 protected function _printJson($object)
 {
     if (!headers_sent()) {
         header("Content-type: application/json");
     }
     echo json_encode($object);
 }

 function __construct()
 {
     parent::__construct();
     if (RSFormProHelper::isJ16()) {
         JHTML::_('behavior.framework');
     }
     if (!headers_sent()) {
         header('Content-type: text/html; charset=utf-8');
     }
     $this->_db = JFactory::getDBO();
     $doc =& JFactory::getDocument();
     $doc->addScript(JURI::root(true) . '/administrator/components/com_rsform/assets/js/jquery.js?v=40');
     $doc->addScript(JURI::root(true) . '/administrator/components/com_rsform/assets/js/tablednd.js?v=40');
     $doc->addScript(JURI::root(true) . '/administrator/components/com_rsform/assets/js/jquery.scrollto.js?v=40');
     $doc->addScript(JURI::root(true) . '/administrator/components/com_rsform/assets/js/script.js?v=41');
     $doc->addStyleSheet(JURI::root(true) . '/administrator/components/com_rsform/assets/css/style.css?v=42');
     if (RSFormProHelper::isJ16()) {
         $doc->addStyleSheet(JURI::root(true) . '/administrator/components/com_rsform/assets/css/style16.css?v=40');
     }
     $this->registerTask('formsApply', 'formsSave');
     $this->registerTask('formsPublish', 'formsChangeStatus');
     $this->registerTask('formsUnpublish', 'formsChangeStatus');
     $this->registerTask('componentsPublish', 'componentsChangeStatus');
     $this->registerTask('componentsUnpublish', 'componentsChangeStatus');
     $this->registerTask('configurationApply', 'configurationSave');
     $this->registerTask('submissionsExportCSV', 'submissionsExport');
     $this->registerTask('submissionsExportExcel', 'submissionsExport');
     $this->registerTask('submissionsExportXML', 'submissionsExport');
     $this->registerTask('submissionsApply', 'submissionsSave');
     $this->registerTask('submissionsSave', 'submissionsSave');
     $this->registerTask('richtextApply', 'richtextSave');
     $this->registerTask('emailApply', 'emailSave');
 }

function redirect($url, $permanent = false)
{
    if (headers_sent() === false) {
        header('Location: ' . $url, true, $permanent === true ? 301 : 302);
    }
    exit;
}

 /**
  * Constructor.
  * 
  * Create new JsHttpRequest backend object and attach it
  * to script output buffer. As a result - script will always return
  * correct JavaScript code, even in case of fatal errors.
  */
 function JsHttpRequest($enc)
 {
     // QUERY_STRING is in form: PHPSESSID=<sid>&a=aaa&b=bbb&<id>
     // where <id> is request ID, <sid> - session ID (if present),
     // PHPSESSID - session parameter name (by default = "PHPSESSID").
     // Parse QUERY_STRING wrapper format.
     if (preg_match('/^(.*)(?:&|^)JsHttpRequest=(\\d+)-([^&]+)((?:&|$).*)$/s', $_SERVER['QUERY_STRING'], $m)) {
         $this->ID = $m[2];
         $this->LOADER = strtolower($m[3]);
         $_SERVER['QUERY_STRING'] = $m[1] . $m[4];
         unset($_GET['JsHttpRequest']);
         unset($_REQUEST['JsHttpRequest']);
     } else {
         $this->ID = 0;
         $this->LOADER = 'unknown';
     }
     // Start OB handling early.
     $this->_uniqHash = md5(microtime() . getmypid());
     ini_set('error_prepend_string', ini_get('error_prepend_string') . $this->_uniqHash);
     ini_set('error_append_string', ini_get('error_append_string') . $this->_uniqHash);
     ob_start(array(&$this, "_obHandler"));
     // Set up encoding.
     $this->setEncoding($enc);
     // Check if headers are already sent (see Content-Type library usage).
     // If true - generate debug message and exit.
     $file = $line = null;
     if (headers_sent($file, $line)) {
         trigger_error("HTTP headers are already sent" . ($line !== null ? " in {$file} on line {$line}" : "") . ". " . "Possibly you have extra spaces (or newlines) before first line of the script or any library. " . "Please note that Subsys_JsHttpRequest uses its own Content-Type header and fails if " . "this header cannot be set. See header() function documentation for details", E_USER_ERROR);
         exit;
     }
 }