Deprecated: Calling get_class() without arguments is deprecated in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php on line 329
Cannot modify header information - headers already sent by (output started at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php:329) (500 Internal Server Error)

Symfony Exception

Symfony Docs

ErrorException

HTTP 500 Internal Server Error

Cannot modify header information - headers already sent by (output started at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php:329)

Exception

ErrorException

in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php (line 1775)
  1.          * Any LWS that occurs between field-content MAY be replaced with a
  2.          * single SP before interpreting the field value or forwarding the
  3.          * message downstream.
  4.          */
  5.         $value = preg_replace( '/\s+/', ' ', $value );
  6.         header( sprintf( '%s: %s', $key, $value ) );
  7.     }
  9.     /**
  10.      * Sends multiple HTTP headers.
  11.      *
in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-content/themes/firestarter-theme/vendor/roots/acorn/src/Roots/Acorn/Bootstrap/HandleExceptions.php -> handleError (line 54)
  1.      * @throws \ErrorException
  2.      */
  3.     public function handleError($level, $message, $file = '', $line = 0, $context = [])
  4.     {
  5.         try {
  6.             parent::handleError($level, $message, $file, $line, $context);
  7.         } catch (Throwable $e) {
  8.             if (! apply_filters('acorn/throw_error_exception', true, $e)) {
  9.                 return false;
  10.             }
HandleExceptions->handleError(2, 'Cannot modify header information - headers already sent by (output started at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php:329)', '/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php', 1775)
header('Content-Type: application/json; charset=UTF-8') in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php (line 1775)
  1.          * Any LWS that occurs between field-content MAY be replaced with a
  2.          * single SP before interpreting the field value or forwarding the
  3.          * message downstream.
  4.          */
  5.         $value = preg_replace( '/\s+/', ' ', $value );
  6.         header( sprintf( '%s: %s', $key, $value ) );
  7.     }
  9.     /**
  10.      * Sends multiple HTTP headers.
  11.      *
WP_REST_Server->send_header('Content-Type', 'application/json; charset=UTF-8') in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php (line 310)
  1.         if ( isset( $_GET['_jsonp'] ) ) {
  2.             $jsonp_callback = $_GET['_jsonp'];
  3.         }
  5.         $content_type = ( $jsonp_callback && $jsonp_enabled ) ? 'application/javascript' : 'application/json';
  6.         $this->send_header( 'Content-Type', $content_type . '; charset=' . get_option( 'blog_charset' ) );
  7.         $this->send_header( 'X-Robots-Tag', 'noindex' );
  9.         $api_root = get_rest_url();
  10.         if ( ! empty( $api_root ) ) {
  11.             $this->send_header( 'Link', '<' . sanitize_url( $api_root ) . '>; rel="https://api.w.org/"' );
WP_REST_Server->serve_request('/oembed/1.0/embed') in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api.php (line 418)
  1.     // Fire off the request.
  2.     $route = untrailingslashit( $GLOBALS['wp']->query_vars['rest_route'] );
  3.     if ( empty( $route ) ) {
  4.         $route = '/';
  5.     }
  6.     $server->serve_request( $route );
  8.     // We're done.
  9.     die();
  10. }
rest_api_loaded(object(WP)) in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-hook.php (line 310)
  2.                 // Avoid the array_slice() if possible.
  3.                 if ( 0 == $the_['accepted_args'] ) {
  4.                     $value = call_user_func( $the_['function'] );
  5.                 } elseif ( $the_['accepted_args'] >= $num_args ) {
  6.                     $value = call_user_func_array( $the_['function'], $args );
  7.                 } else {
  8.                     $value = call_user_func_array( $the_['function'], array_slice( $args, 0, (int) $the_['accepted_args'] ) );
  9.                 }
  10.             }
  11.         } while ( false !== next( $this->iterations[ $nesting_level ] ) );
WP_Hook->apply_filters('', array(object(WP))) in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-hook.php (line 334)
  1.      *
  2.      * @param array $args Parameters to pass to the callback functions.
  3.      */
  4.     public function do_action( $args ) {
  5.         $this->doing_action = true;
  6.         $this->apply_filters( '', $args );
  8.         // If there are recursive calls to the current action, we haven't finished it until we get to the last one.
  9.         if ( ! $this->nesting_level ) {
  10.             $this->doing_action = false;
  11.         }
WP_Hook->do_action(array(object(WP))) in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/plugin.php (line 565)
  2.     if ( ! isset( $wp_filter['all'] ) ) {
  3.         $wp_current_filter[] = $hook_name;
  4.     }
  6.     $wp_filter[ $hook_name ]->do_action( $args );
  8.     array_pop( $wp_current_filter );
  9. }
  11. /**
do_action_ref_array('parse_request', array(object(WP))) in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp.php (line 398)
  1.          *
  2.          * @since 2.1.0
  3.          *
  4.          * @param WP $wp Current WordPress environment instance (passed by reference).
  5.          */
  6.         do_action_ref_array( 'parse_request', array( &$this ) );
  8.         return true;
  9.     }
  11.     /**
WP->parse_request('') in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp.php (line 779)
  1.      * @param string|array $query_args Passed to parse_request().
  2.      */
  3.     public function main( $query_args = '' ) {
  4.         $this->init();
  6.         $parsed = $this->parse_request( $query_args );
  8.         if ( $parsed ) {
  9.             $this->query_posts();
  10.             $this->handle_404();
  11.             $this->register_globals();
WP->main('') in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/functions.php (line 1335)
  1.  * @param string|array $query_vars Default WP_Query arguments.
  2.  */
  3. function wp( $query_vars = '' ) {
  4.     global $wp, $wp_query, $wp_the_query;
  6.     $wp->main( $query_vars );
  8.     if ( ! isset( $wp_the_query ) ) {
  9.         $wp_the_query = $wp_query;
  10.     }
  11. }
wp() in /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-blog-header.php (line 16)
  2.     // Load the WordPress library.
  3.     require_once __DIR__ . '/wp-load.php';
  5.     // Set up the WordPress query.
  6.     wp();
  8.     // Load the theme template.
  9.     require_once ABSPATH . WPINC . '/template-loader.php';
  11. }
require('/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-blog-header.php') in /www/htdocs/w01eafab/rml-lehrlingsprojekt/index.php (line 17)
  1.  * @var bool
  2.  */
  3. define( 'WP_USE_THEMES', true );
  5. /** Loads the WordPress Environment and Template */
  6. require __DIR__ . '/wp-blog-header.php';

Stack Trace

ErrorException 
ErrorException:
Cannot modify header information - headers already sent by (output started at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php:329)

  at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php:1775
  at Illuminate\Foundation\Bootstrap\HandleExceptions->handleError(2, 'Cannot modify header information - headers already sent by (output started at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php:329)', '/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php', 1775, array())
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-content/themes/firestarter-theme/vendor/roots/acorn/src/Roots/Acorn/Bootstrap/HandleExceptions.php:54)
  at Roots\Acorn\Bootstrap\HandleExceptions->handleError(2, 'Cannot modify header information - headers already sent by (output started at /www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-http.php:329)', '/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php', 1775)
  at header('Content-Type: application/json; charset=UTF-8')
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php:1775)
  at WP_REST_Server->send_header('Content-Type', 'application/json; charset=UTF-8')
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api/class-wp-rest-server.php:310)
  at WP_REST_Server->serve_request('/oembed/1.0/embed')
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/rest-api.php:418)
  at rest_api_loaded(object(WP))
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-hook.php:310)
  at WP_Hook->apply_filters('', array(object(WP)))
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp-hook.php:334)
  at WP_Hook->do_action(array(object(WP)))
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/plugin.php:565)
  at do_action_ref_array('parse_request', array(object(WP)))
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp.php:398)
  at WP->parse_request('')
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/class-wp.php:779)
  at WP->main('')
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-includes/functions.php:1335)
  at wp()
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-blog-header.php:16)
  at require('/www/htdocs/w01eafab/rml-lehrlingsprojekt/wp-blog-header.php')
     (/www/htdocs/w01eafab/rml-lehrlingsprojekt/index.php:17)