用asp检测email的合法性函数

邮箱有效性验证函数及应用

最新推荐文章于 2022-01-10 16:18:43 发布

最新推荐文章于 2022-01-10 16:18:43 发布 · 137 阅读

博客展示了一个用于验证邮箱有效性的函数 IsValidEmail，通过对邮箱格式进行多方面检查，如分割、字符范围、点的位置等判断其是否有效。若输入邮箱无效，会弹出提示并重新加载注册页面。

function IsValidEmail(email)
dim names, name, i, c
IsValidEmail = true
names = Split(email, "@")
if UBound(names) <> 1 then
IsValidEmail = false
exit function
end if
for each name in names
if Len(name) <= 0 then
IsValidEmail = false
exit function
end if
for i = 1 to Len(name)
c = Lcase(Mid(name, i, 1))
if InStr("abcdefghijklmnopqrstuvwxyz_-.", c) <= 0 and not IsNumeric(c) then
IsValidEmail = false
exit function
end if
next
if Left(name, 1) = "." or Right(name, 1) = "." then
IsValidEmail = false
exit function
end if
next
if InStr(names(1), ".") <= 0 then
IsValidEmail = false
exit function
end if
i = Len(names(1)) - InStrRev(names(1), ".")
if i <> 2 and i <> 3 then
IsValidEmail = false
exit function
end if
if InStr(email, "..") > 0 then
IsValidEmail = false
end if
end function

email = trim(request("email"))
if IsValidEmail(email)=false then
Response.Write"<script Language='javascript'>alert('请输入正确的邮箱!');window.location.reload('reg.asp')</script>"
response.end
end if