Checking the validity of email format HTML input

Question

I have an input field to enter an email address as follows:

 <input type="email" name="email" id="email" title="E-mail(Format: email@example.com)">

I want to check the validity of this when user submits the email address. So i used this code:

 <?php
 $email =($_POST['email']);
 if(!filter_var($email, FILTER_VALIDATE_EMAIL))
 {
 echo "E-mail is not valid";
 }
else
{
 echo "E-mail is valid"; }? >

But although i enter an email as 'someone@example' this will print 'email is valid'. How can i validate the emails with 'someone@example.com' format? That means the format and the need of '@' and '.com' ?

When you have fully working awesome solution what else do you want? — Abhishek, Jan 14 '14 at 08:20
Well here you go even in 5.3 dev its working fine: http://codepad.viper-7.com/zUtcor Though there was problem in php 5.2.13 and lesser version regarding this. — Abhishek, Jan 14 '14 at 08:37
@dnk you are wrong no problem with code, its working fine for me and everywhere. — Abhishek, Jan 14 '14 at 09:22
@dnk how about running this code in browser and tell us details: echo phpversion(); — Abhishek, Jan 14 '14 at 09:24
This worked fine in Firefox. But not working in Google Chrome. Then is it something wrong with the Chrome browser? — Dakshila Kamalsooriya, Jan 14 '14 at 11:09

score 0 · Answer 1 · answered Jan 14 '14 at 08:19

0

You will need to use an e-mail regular expressions and PHP function preg_match http://au1.php.net/preg_match.

answered Jan 14 '14 at 08:19

John Arckai

83
10

score 0 · Answer 2 · answered Jan 14 '14 at 08:22

I recommend using this function

public static function isEmail($value)
  {
    $atom = "[-a-z0-9!#$%&'*+/=?^_`{|}~]"; // RFC 5322 unquoted characters in local-part
    $localPart = "(?:\"(?:[ !\\x23-\\x5B\\x5D-\\x7E]*|\\\\[ -~])+\"|$atom+(?:\\.$atom+)*)"; // quoted or unquoted
    $alpha = "a-z\x80-\xFF"; // superset of IDN
    $domain = "[0-9$alpha](?:[-0-9$alpha]{0,61}[0-9$alpha])?"; // RFC 1034 one domain component
    $topDomain = "[$alpha](?:[-0-9$alpha]{0,17}[$alpha])?";
    return (bool) preg_match("(^$localPart@(?:$domain\\.)+$topDomain\\z)i", $value);
}

Its from Nette framework and its the best function for email validation ive ever seen.

https://github.com/nette/nette/blob/master/Nette/Utils/Validators.php

This is not a solution its an alternate. – Abhishek Jan 14 '14 at 08:39 — Abhishek, Jan 14 '14 at 08:39
It is. But its obviously a little better then filter_var :) – Jan Dlouhý Jan 14 '14 at 08:46 — Jan Dlouhý, Jan 14 '14 at 08:46

Checking the validity of email format HTML input

2 Answers2