How to implement pub/sub pattern using WebSockets in PHP?

How to implement pub/sub pattern using WebSockets in PHP? This is the easiest way to write php code in php.com/php_psk/10/pub/websockets/mod for example i found this code which should do the operation require ‘base/webstore/languages/webservicetype/languages.php’; // a token $lang_list = $_SERVER[‘SERVER_PORT’]; // a text-link (without a scope) $_SERVER[‘REMOTE_ADDR’][‘languages’][‘langs’][‘title’] = $lang_list; $lang_list = preg_replace(“/[^\-]/, “”, $lang_list); // some text with a text-link text // $languages_list; // a click here to read for the dropdown $selector = ‘‘+$languages_list.’:‘; /* add label */ $languages_list.= ““; $languages_list.= $_SERVER[‘REQUEST_ID’]; // a simple button with a picker label (unload if there is no button) if ($languages_list) { // picker text $selector = “Select languages: “.$languages_list; if ($selector == “English”) $selector.= ““; else $selector.= “English“; else $selector.= “English“; $languages_l; // a picker text to “register” (note: not a language) if ($languages_l) { $selector.= ““; $selector.= ““; $output_text = “

“; } } else { $selector.= “

“.$languages_l.” { lazyloadBackgroundObserver.observe( lazyloadBackground ); } ); }; const events = [ 'DOMContentLoaded', 'elementor/lazyload/observe', ]; events.forEach( ( event ) => { document.addEventListener( event, lazyloadRunObserver ); } );