Added: Create new refuel record

core/Validator.php

@@ -12,6 +12,15 @@ class Validator {
         }
     }
 
+    /**
+     * Check if a field contains numbers
+     */
+    public function number($field, $value, $message = null) {
+        if(!is_numeric($value)) {
+            $this->errors[$field] = $message ?? "$field must be an number";
+        }
+    }
+
     /**
      * Check if a field meets minimum length
      */