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系统发生错误

[2] ErrorException in Book.php line 29

session_start(): Cannot start session when headers already sent

  1. use gwy\h5\model\BookExtend;

  2. use think\Db;

  3. 

  4. class Book extends BasicAction

  5. {

  6.     private $UUID = null;

  7.     public function __construct()

  8.     {

  9.         parent::__construct();

  10.         session_start();

  11.         $this->set_pageAction("book");

  12.         $this->UUID = cookie("UUID");

  13.         if(empty($this->UUID)){

  14.             $uuid = md5(session_id());

  15.             cookie("UUID", $uuid);

  16.             $this->UUID = $uuid;

  17.         };

  18.         //微信分享

  19.         $webdata['share_title'] = "国公网 教材";

Call Stack

  1. in Book.php line 29
  2. at Error::appError(2, 'session_start(): Can...', '/data/ggw/applicatio...', 29, [])
  3. at session_start() in Book.php line 29
  4. at Book->__construct()
  5. at ReflectionClass->newInstanceArgs([]) in App.php line 243
  6. at App::invokeClass('gwy\h5\controller\Bo...') in Loader.php line 418
  7. at Loader::controller('book', 'controller', false, 'Error') in App.php line 367
  8. at App::module(['h5', 'book', null], ['app_namespace' => 'gwy', 'app_debug' => true, 'app_trace' => false, ...], true) in App.php line 130
  9. at App::run() in start.php line 18
  10. at require('/data/ggw/thinkphp/s...') in index.php line 37

Environment Variables

GET Dataempty
POST Dataempty
Filesempty
Cookiesempty
Sessionempty
Server/Request Data
USER www
HOME /home/www
HTTP_HOST h5.21gwy.com
HTTP_ACCEPT_ENCODING gzip, br, zstd, deflate
HTTP_USER_AGENT Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_ACCEPT */*
PATH_INFO /book
REDIRECT_STATUS 200
SERVER_NAME www.21gwy.com
SERVER_PORT 80
SERVER_ADDR 10.206.0.16
REMOTE_PORT 13893
REMOTE_ADDR 18.225.56.185
SERVER_SOFTWARE nginx/1.18.0
GATEWAY_INTERFACE CGI/1.1
REQUEST_SCHEME http
SERVER_PROTOCOL HTTP/1.1
DOCUMENT_ROOT /data/ggw/public
DOCUMENT_URI /index.php
REQUEST_URI /book
SCRIPT_NAME /index.php
CONTENT_LENGTH
CONTENT_TYPE
REQUEST_METHOD GET
QUERY_STRING s=/book
SCRIPT_FILENAME /data/ggw/public/index.php
FCGI_ROLE RESPONDER
PHP_SELF /index.php
REQUEST_TIME_FLOAT 1742238749.4156
REQUEST_TIME 1742238749
Environment Variablesempty
ThinkPHP Constants
APP_PATH /data/ggw/public/../application/
BIND_MODULE h5
THINK_VERSION 5.0.5
THINK_START_TIME 1742238749.416
THINK_START_MEM 417320
EXT .php
DS /
THINK_PATH /data/ggw/thinkphp/
LIB_PATH /data/ggw/thinkphp/library/
CORE_PATH /data/ggw/thinkphp/library/think/
TRAIT_PATH /data/ggw/thinkphp/library/traits/
ROOT_PATH /data/ggw/
EXTEND_PATH /data/ggw/extend/
VENDOR_PATH /data/ggw/vendor/
RUNTIME_PATH /data/ggw/runtime/
LOG_PATH /data/ggw/runtime/log/
CACHE_PATH /data/ggw/runtime/cache/
TEMP_PATH /data/ggw/runtime/temp/
CONF_PATH /data/ggw/public/../application/
CONF_EXT .php
ENV_PREFIX PHP_
IS_CLI false
IS_WIN false