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判斷Email地址是否正確的幾個(gè)函數(shù)(asp/php/javascript)

 更新時(shí)間：2010年08月08日 13:14:36   作者：  
今天總結(jié)了幾個(gè)判斷Email地址的函數(shù)，和大家分享一下
用js判斷
復(fù)制代碼 代碼如下:

function is_email( str ){
p = /^([\w\.-]+)@([a-zA-Z0-9-]+)(\.[a-zA-Z\.]+)$/;
if(str.search(p) == -1){
return false;
}else{
return true;
}
}

用PHP判斷
復(fù)制代碼 代碼如下:

function is_email($email){
$pattern="/^([\w\.-]+)@([a-zA-Z0-9-]+)(\.[a-zA-Z\.]+)$/i";//包含字母、數(shù)字、下劃線_和點(diǎn).的名字的email
if(preg_match($pattern,$email,$matches)){
return true;
}else{
return false;
}
}

用ASP判斷
復(fù)制代碼 代碼如下:

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

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