update: add more unit for filters

Author: inhere

src/Filter/Filters.php

@@ -610,32 +610,31 @@ public static function fullSpecialChars($val, int $flags = 0): string
     /**
      * 字符串长度过滤截取
      *
-     * @param string  $string 字符串
-     * @param integer $start 起始长度
-     * @param int     $end 结束位置
+     * @param string  $string
+     * @param integer $start
+     * @param int     $length
      *
      * @return string
      */
-    public static function stringCute($string, $start = 0, $end = null): string
+    public static function stringCute($string, $start = 0, $length = 0): string
     {
         if (!is_string($string)) {
             return '';
         }
 
-        // $length    = Helper::strlen($string);
-        return self::subStr($string, $start, $end);
+        return self::subStr($string, (int)$start, (int)$length);
     }
 
     /**
      * @param string $string
      * @param int    $start
-     * @param null   $end
+     * @param int    $length
      *
      * @return string
      */
-    public static function cut($string, $start = 0, $end = null): string
+    public static function cut($string, $start = 0, $length = 0): string
     {
-        return self::stringCute($string, $start, $end);
+        return self::stringCute($string, $start, $length);
     }
 
     /**

src/Helper.php

@@ -109,10 +109,12 @@ public static function getMimeType(string $file): string
         }
 
         if (function_exists('mime_content_type')) {
+            /** @noinspection PhpComposerExtensionStubsInspection */
             return mime_content_type($file);
         }
 
         if (function_exists('finfo_file')) {
+            /** @noinspection PhpComposerExtensionStubsInspection */
             return (string)finfo_file(finfo_open(FILEINFO_MIME_TYPE), $file);
         }