Fatal error: Uncaught Error: Call to undefined function socket_create() in /var/www/html/phpkobo/research/php-snippet/websocket_demo/demo/socket.php:36 Stack trace: #0 /var/www/html/phpkobo/research/php-snippet/websocket_demo/demo/socket.php(4): create_connection('localhost', 1740) #1 {main} thrown in /var/www/html/phpkobo/research/php-snippet/websocket_demo/demo/socket.php on line 36