diff --git a/PHP 1 lesson/user1/find_php_files_static.php b/PHP 1 lesson/user1/find_php_files_static.php
index e4a6007..bbc0470 100644
--- a/PHP 1 lesson/user1/find_php_files_static.php	
+++ b/PHP 1 lesson/user1/find_php_files_static.php	
@@ -1,24 +1,47 @@
 <?php
-function Scan($dir)
+declare(strict_types=1);
+
+/**
+ * @param string $dir
+ * @param array $buffer
+ * @return array
+ */
+function findPhpFilesInDir(string $dir, array &$buffer): array
 {
-    static $fnames = array();
-    if($d=opendir($dir))
-    {
-        while(false !== ($file = readdir($d)))
-        {
-            if ($file == '.' || $file == '..')
-                continue;
-            if(is_dir($dir . DIRECTORY_SEPARATOR . $file))
-                Scan($dir . DIRECTORY_SEPARATOR . $file);
-            else
-                if (pathinfo( $file, PATHINFO_EXTENSION )==='php')
+    if (!is_dir($dir)) {
+        $buffer[] = $dir . ' - is not a directory!';
+        return [];
+    }
+
+    if (!$dh = opendir($dir)) {
+        $buffer[] = 'Can not open a directory: ' . $dir . '';
+        return [];
+    }
 
-                    $fnames[] = $file;
+    static $phpFiles = [];
+    while ($file = readdir($dh)) {
+        if ($file === '.' || $file === '..') {
+            continue;
+        }
+        if (is_dir($subDir = $dir . DIRECTORY_SEPARATOR . $file)) {
+            findPhpFilesInDir($subDir);
+            continue;
+        }
+        if (pathinfo($file, PATHINFO_EXTENSION) === 'php') {
+            $phpFiles[] = $file;
         }
-        closedir($d);
     }
-    return $fnames;
+    closedir($dh);
+
+    return $phpFiles;
 }
 
+$buffer = [];
+$phpFiles = findPhpFilesInDir('dir', $buffer);
+
 echo '<pre>';
-var_dump(Scan('dir'));
+print_r([
+    'files' => $phpFiles,
+    'info' => $buffer,
+]);
+echo '</pre>';
diff --git a/PHP 1 lesson/user1/sum_less.php b/PHP 1 lesson/user1/sum_less.php
index 759ff85..2f5cdf6 100644
--- a/PHP 1 lesson/user1/sum_less.php	
+++ b/PHP 1 lesson/user1/sum_less.php	
@@ -1,15 +1,17 @@
 <?php
-function SumLess ($numer){
-    if(is_numeric($numer) and is_int($numer)){
-        $sum = 0;
-        while ($numer>0){
-            $numer--;
-            $sum += $numer;
-
-        }
+declare(strict_types=1);
 
+/**
+ * @param int $number
+ * @return int
+ */
+function sumLess(int $number): int
+{
+    $sum = 0;
+    while ($number > 0) {
+        $number--;
+        $sum += $number;
     }
-    else echo 'Введите целое цчисло';
 
     return $sum;
 }
\ No newline at end of file