diff --git a/[core]/es_extended/common/functions.lua b/[core]/es_extended/common/functions.lua
index f6414bdc..0e9adb08 100644
--- a/[core]/es_extended/common/functions.lua
+++ b/[core]/es_extended/common/functions.lua
@@ -106,3 +106,36 @@ end
 function ESX.Round(value, numDecimalPlaces)
     return ESX.Math.Round(value, numDecimalPlaces)
 end
+
+function ESX.ValidateType(value, ...)
+    local types = { ... }
+    if #types == 0 then return true end
+
+    local mapType = {}
+    for i = 1, #types, 1 do
+        local validateType = types[i]
+        assert(type(validateType) == "string", "bad argument types, only expected string") -- should never use anyhing else than string
+        mapType[validateType] = true
+    end
+
+    local valueType = type(value)
+
+    local matches = mapType[valueType] ~= nil
+
+    if not matches then
+        local requireTypes = table.concat(types, " or ")
+        local errorMessage = ("bad value (%s expected, got %s)"):format(requireTypes, valueType)
+
+        return false, errorMessage
+    end
+
+    return true
+end
+
+function ESX.AssertType(...)
+    local matches, errorMessage = ESX.ValidateType(...)
+
+    assert(matches, errorMessage)
+
+    return matches
+end