修改配置文件设置文件大小优化

extend/base/helper.php

@@ -353,13 +353,44 @@ function array_to_table($array_tree, $prefix_key = '')
 
 function format_bytes($size, $delimiter = '')
 {
+    if (is_null($size)) {
+        return '0B';
+    }
     $units = ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];
     for ($i = 0; $size >= 1024 && $i < 5; $i++) {
         $size /= 1024;
     }
-
     return round($size, 2) . $delimiter . $units[$i];
 }
+function parse_bytes($size)
+{
+    $unit = strtolower(substr($size, -1));
+    $size = (int) $size;
+    switch ($unit) {
+        case 'b':
+            break;
+        case 'k':
+            $size *= 1024;
+            break;
+        case'm':
+            $size *= 1024 * 1024;
+            break;
+        case 'g':
+            $size *= 1024 * 1024 * 1024;
+            break;
+        case 't':
+            $size *= 1024 * 1024 * 1024 * 1024;
+            break;
+        case 'p':
+            $size *= 1024 * 1024 * 1024 * 1024 * 1024;
+            break;
+        default:
+            return $size;
+    }
+
+    return $size;
+}
+
 
 function get_store_value($key, $default = null)
 {