2017-05-09 18:22 浏览 177


I am creating contact form and there I have input field, type email. In the future, I am planing to save this email and all other data into database. Therefore I have a question on how to validate that email properly in PHP?

-It has to accept utf-8 and all international individual characters that email can have.

For now, I have made two different email validations.

First one is made by using filter_var() but this one doesn't allow international characters to be used. (Therefore I have removed it.)

Second, I have used custom regex '/^[^\s@]+@[^\s@]+.[^\s@]+$/ui' and this one is allowing use of international characters but it also allows '/* and other characters which are threat for possible SQL injection.

I am also aware, that there is an option to send email to a user to verify that email but I am wondering, is there any verification method which I can use to validate email internationally and to prevent SQL injection?

Maybe encrypting/decrypting email? Maybe PDO should be enough?

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3条回答 默认 最新

  • 已采纳
    dream12001 dream12001 2019-07-25 16:32

    In case someone is looking for an answer to this question, Now after two years of working as a developer I would agree with Alex Howansky comment:

    Preventing SQL injection doesn't happen by ensuring you have a valid email address, it happens by using prepared statements with bound parameters.

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  • dpqy77560 dpqy77560 2017-05-09 18:29

    Regex to validate non-standard email address:

    ^([\p{L}\.\-\d]+)@([\p{L}\-\.\d]+)((\.(\p{L})      {2,63})+)$

    Original source How to validate non-english (UTF-8) encoded email address in Javascript and PHP?

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  • donglinxin8765 donglinxin8765 2017-05-09 19:03

    As recommended by brasofilo and since I dont have any code from your project to work with:

     iconv_set_encoding("internal_encoding", "UTF-8");
    $subject = "Testmail — Special Characters";
    $msg = "Hi there,
    this isn’t something easy.
    I haven’t thought that it’s that complicated!";
    mail(utf8_decode($to), utf8_decode($subject), utf8_decode($msg), utf8_decode($from)."
    Content-Type: text/plain; charset=UTF-8
    Content-Transfer-Encoding: 8bit

    php mail special characters utf8

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