wip found how to theorically get ajax request in php but for the moment i get error 400

plugins/wp_model_plugin/php/utils/add_to_front.php

@@ -55,9 +55,6 @@ function add_var_to_front($vars, $handle = "init") {
 	$handle = pathinfo($handle, PATHINFO_FILENAME);
 	$object_name = "php_data";
 
-	$ajax_url = admin_url( 'admin-ajax.php' );
-	$vars["ajax_url"] = $ajax_url;
-
 	wp_localize_script($handle, $object_name, $vars);
 }
 

plugins/wp_model_plugin/php/utils/create_html.php

@@ -21,10 +21,11 @@ in opposition to the methode file_get_contents()
 
 https://stackoverflow.com/a/4402045/9497573
 */
-function create_html($files, $vars) {
+function create_html($files, $vars = null) {
 	$files = (array)$files;
 	$html_dir = PLUGIN_DIR.'html/';
-	extract($vars);
+	if (!is_null($vars))
+		extract($vars);
 
 	ob_start();
 	foreach($files as $file) {