diff --git a/src/_h5ai/server/php/inc/core/class-api.php b/src/_h5ai/server/php/inc/core/class-api.php
index 69d320b8..03b03af5 100644
--- a/src/_h5ai/server/php/inc/core/class-api.php
+++ b/src/_h5ai/server/php/inc/core/class-api.php
@@ -15,32 +15,32 @@ class Api {
 
     public function apply() {
 
-        $action = $this->request->query("action");
-        $supported = ["download", "get", "login", "logout"];
-        Util::json_fail(Util::ERR_UNSUPPORTED, "unsupported action", !in_array($action, $supported));
+        $action = $this->request->query('action');
+        $supported = ['download', 'get', 'login', 'logout'];
+        Util::json_fail(Util::ERR_UNSUPPORTED, 'unsupported action', !in_array($action, $supported));
 
-        $methodname = "on_${action}";
+        $methodname = 'on_' . $action;
         $this->$methodname();
     }
 
     private function on_download() {
 
-        Util::json_fail(Util::ERR_DISABLED, "download disabled", !$this->app->query_option("download.enabled", false));
+        Util::json_fail(Util::ERR_DISABLED, 'download disabled', !$this->app->query_option('download.enabled', false));
 
-        $as = $this->request->query("as");
-        $type = $this->request->query("type");
-        $base_href = $this->request->query("baseHref");
-        $hrefs = $this->request->query("hrefs");
+        $as = $this->request->query('as');
+        $type = $this->request->query('type');
+        $base_href = $this->request->query('baseHref');
+        $hrefs = $this->request->query('hrefs');
 
         $archive = new Archive($this->app);
 
         set_time_limit(0);
-        header("Content-Type: application/octet-stream");
-        header("Content-Disposition: attachment; filename=\"$as\"");
-        header("Connection: close");
+        header('Content-Type: application/octet-stream');
+        header('Content-Disposition: attachment; filename="' . $as . '"');
+        header('Connection: close');
         $ok = $archive->output($type, $base_href, $hrefs);
 
-        Util::json_fail(Util::ERR_FAILED, "packaging failed", !$ok);
+        Util::json_fail(Util::ERR_FAILED, 'packaging failed', !$ok);
         exit;
     }
 
@@ -48,68 +48,68 @@ class Api {
 
         $response = [];
 
-        foreach (["langs", "options", "types"] as $name) {
+        foreach (['langs', 'options', 'types'] as $name) {
             if ($this->request->query_boolean($name, false)) {
 
-                $methodname = "get_${name}";
+                $methodname = 'get_' . $name;
                 $response[$name] = $this->app->$methodname();
             }
         }
 
-        if ($this->request->query_boolean("setup", false)) {
+        if ($this->request->query_boolean('setup', false)) {
 
-            $response["setup"] = $this->setup->to_jsono();
+            $response['setup'] = $this->setup->to_jsono();
         }
 
-        if ($this->request->query_boolean("theme", false)) {
+        if ($this->request->query_boolean('theme', false)) {
 
             $theme = new Theme($this->app);
-            $response["theme"] = $theme->get_icons();
+            $response['theme'] = $theme->get_icons();
         }
 
-        if ($this->request->query("items", false)) {
+        if ($this->request->query('items', false)) {
 
-            $href = $this->request->query("items.href");
-            $what = $this->request->query_numeric("items.what");
+            $href = $this->request->query('items.href');
+            $what = $this->request->query_numeric('items.what');
 
-            $response["items"] = $this->app->get_items($href, $what);
+            $response['items'] = $this->app->get_items($href, $what);
         }
 
-        if ($this->request->query("custom", false)) {
+        if ($this->request->query('custom', false)) {
 
-            Util::json_fail(Util::ERR_DISABLED, "custom disabled", !$this->app->query_option("custom.enabled", false));
-            $href = $this->request->query("custom");
+            Util::json_fail(Util::ERR_DISABLED, 'custom disabled', !$this->app->query_option('custom.enabled', false));
+            $href = $this->request->query('custom');
 
             $custom = new Custom($this->app);
-            $response["custom"] = $custom->get_customizations($href);
+            $response['custom'] = $custom->get_customizations($href);
         }
 
-        if ($this->request->query("l10n", false)) {
+        if ($this->request->query('l10n', false)) {
 
-            Util::json_fail(Util::ERR_DISABLED, "l10n disabled", !$this->app->query_option("l10n.enabled", false));
-            $iso_codes = $this->request->query_array("l10n");
+            Util::json_fail(Util::ERR_DISABLED, 'l10n disabled', !$this->app->query_option('l10n.enabled', false));
+            $iso_codes = $this->request->query_array('l10n');
 
             $iso_codes = array_filter($iso_codes);
-            $response["l10n"] = $this->app->get_l10n($iso_codes);
+            $response['l10n'] = $this->app->get_l10n($iso_codes);
         }
 
-        if ($this->request->query("search", false)) {
+        if ($this->request->query('search', false)) {
 
-            Util::json_fail(Util::ERR_DISABLED, "search disabled", !$this->app->query_option("search.enabled", false));
-            $href = $this->request->query("search.href");
-            $pattern = $this->request->query("search.pattern");
+            Util::json_fail(Util::ERR_DISABLED, 'search disabled', !$this->app->query_option('search.enabled', false));
+            $href = $this->request->query('search.href');
+            $pattern = $this->request->query('search.pattern');
 
             $search = new Search($this->app);
-            $response["search"] = $search->get_items($href, $pattern);
+            $response['search'] = $search->get_items($href, $pattern);
         }
 
-        if ($this->request->query("thumbs", false)) {
+        if ($this->request->query('thumbs', false)) {
 
-            Util::json_fail(Util::ERR_DISABLED, "thumbnails disabled", !$this->app->query_option("thumbnails.enabled", false));
-            Util::json_fail(Util::ERR_UNSUPPORTED, "thumbnails not supported", !$this->setup->get("HAS_PHP_JPEG"));
-            $thumbs = $this->request->query_array("thumbs");
+            Util::json_fail(Util::ERR_DISABLED, 'thumbnails disabled', !$this->app->query_option('thumbnails.enabled', false));
+            Util::json_fail(Util::ERR_UNSUPPORTED, 'thumbnails not supported', !$this->setup->get('HAS_PHP_JPEG'));
+            $thumbs = $this->request->query_array('thumbs');
 
-            $response["thumbs"] = $this->app->get_thumbs($thumbs);
+            $response['thumbs'] = $this->app->get_thumbs($thumbs);
         }
 
         Util::json_exit($response);
@@ -117,12 +117,12 @@ class Api {
 
     private function on_login() {
 
-        $pass = $this->request->query("pass");
-        Util::json_exit(["asAdmin" => $this->app->login_admin($pass)]);
+        $pass = $this->request->query('pass');
+        Util::json_exit(['asAdmin' => $this->app->login_admin($pass)]);
     }
 
     private function on_logout() {
 
-        Util::json_exit(["asAdmin" => $this->app->logout_admin()]);
+        Util::json_exit(['asAdmin' => $this->app->logout_admin()]);
     }
 }