src/Dev/Debug.php
protected static function supportsHTML(HTTPRequest $request = null)
    {
        // No HTML output in CLI
        if (Director::is_cli()) {
            return false;
        }

        // Get current request if registered
        if (!$request && Injector::inst()->has(HTTPRequest::class)) {
            $request = Injector::inst()->get(HTTPRequest::class);
        }
        if (!$request) {
            return false;
        }
        // Request must include text/html
        $accepted = $request->getAcceptMimetypes(false);

        // Explicit opt in
        if (in_array('text/html', $accepted)) {
            return true;
        };

        // Implicit opt-out
        if (in_array('application/json', $accepted)) {
            return false;
        }

        // Fallback to wildcard comparison
        if (in_array('*/*', $accepted)) {
            return true;
        }
        return false;
    }
protected static function supportsHTML(HTTPRequest $request = null)
    {
        // No HTML output in CLI
        if (Director::is_cli()) {
            return false;
        }

        // Get current request if registered
        if (!$request && Injector::inst()->has(HTTPRequest::class)) {
            $request = Injector::inst()->get(HTTPRequest::class);
        }
        if (!$request) {
            return false;
        }
        // Request must include text/html
        $accepted = $request->getAcceptMimetypes(false);

        // Explicit opt in
        if (in_array('text/html', $accepted)) {
            return true;
        };

        // Implicit opt-out
        if (in_array('application/json', $accepted)) {
            return false;
        }

        // Fallback to wildcard comparison
        if (in_array('*/*', $accepted)) {
            return true;
        }
        return false;
    }
protected static function supportsHTML ( HTTPRequest $ request = null ) { // No HTML output in CLI if ( Director :: is_cli ( ) ) { return false ; } // Get current request if registered if ( ! $ request && Injector :: inst ( ) -> has ( HTTPRequest :: class ) ) { $ request = Injector :: inst ( ) -> get ( HTTPRequest :: class ) ; } if ( ! $ request ) { return false ; } // Request must include text/html $ accepted = $ request -> getAcceptMimetypes ( false ) ; // Explicit opt in if ( in_array ( 'text/html' , $ accepted ) ) { return true ; } ; // Implicit opt-out if ( in_array ( 'application/json' , $ accepted ) ) { return false ; } // Fallback to wildcard comparison if ( in_array ( '*/*' , $ accepted ) ) { return true ; } return false ; }
Determine if the given request supports html output

@param HTTPRequest $request
@return bool
Determine if the given request supports html output