email validation function does not allow something@360.com address

[jasonc]

the following script is not allowing email addresses which have something@360.com

 

the @360.com part is what is failing.

 

can anyone suggest a better email validation script, one that checks very basic tests to see of the email address has the @ and a . (dot)  as this script i have been using seems to be failing me now.

 

function ValidEmail($address)
{
//echo('.'.$address.'.');

$atom = '[-a-z0-9!#$%&\'*+/=?^_`{|}~]';    // allowed characters for part before "at" character
$domain = '([a-z]([-a-z0-9]*[a-z0-9]+)?)'; // allowed characters for part after "at" character

$regex = '^' . $atom . '+' .        // One or more atom characters.
'(\.' . $atom . '+)*'.              // Followed by zero or more dot separated sets of one or more atom characters.
'@'.                                // Followed by an "at" character.
'(' . $domain . '{1,63}\.)+'.        // Followed by one or max 63 domain characters (dot separated).
$domain . '{2,63}'.                  // Must be followed by one set consisting a period of two
'$';                                // or max 63 domain characters.

if ($address =="") {
$address = "";
return false;
} elseif (!eregi($regex, $address)) {
$address = "invalid";
return false;
}
return true;

}

 

[Psycho]

Here is the one I have developed and continued to improve along with a complete explanation of how it does the validation.

// NOTES:
//
// Format test
// - Username:
//     - Can contain the following characters: 
//         - Uppercase and lowercase English letters (a-z, A-Z) 
//         - Digits 0 to 9 
//         - Characters _ ! # $ % & ' * + - / = ? ^ ` { | } ~ 
//     - May contain '.' (periods), but cannot begin or end with a period
//       and they may not appear in succession (i.e. 2 or more in a row) 
//     - Must be between 1 and 64 characters 
// - Domain:
//     - Can contain the following characters: 'a-z', 'A-Z', '0-9', '-' (hyphen), and '.' (period). 
//     - There may be subdomains, separated by a period (.), but the combined domain may not
//       begin with a period and they not appear in succession (i.e. 2 or more in a row) 
//     - Domain/Subdomain name parts may not begin or end with a hyphen 
//     - Domain/Subdomain name parts must be between 1-64 characters
// - TLD accepts: 'a-z' & 'A-Z' (2 to 6 characters)
//
// Note: the domain and tld parts must be between 4 and 255 characters total 
//
// Length test
// - Username: 1 to 64 characters
// - Domain: 4 to 255 character


//=====================================================
// Function: is_email ( string $email )
//
// Description: Finds whether the given string variable
//              is a properly formatted email.
//
// Parameters: $email the string being evaluated
//
// Return Values: Returns TRUE if $email is valid email
//                format, FALSE otherwise.
//=====================================================

function is_email($email) 
{
    $formatTest = '/^[\w!#$%&\'*+\-\/=?^`{|}~]+(\.[\w!#$%&\'*+\-\/=?^`{|}~]+)*@[a-z\d]([a-z\d-]{0,62}[a-z\d])?(\.[a-z\d]([a-z\d-]{0,62}[a-z\d])?)*\.[a-z]{2,6}$/i';
    $lengthTest = '/^(.{1,64})@(.{4,255})$/';
    return (preg_match($formatTest, $email) && preg_match($lengthTest, $email));
}

[bob.newtek]

The check errantly assumes that the domain cannot begin with a number. Try replacing the $domain assignment with this:

$domain = '(([-a-z0-9]*[a-z0-9]+)?)'; // allowed characters for part after "at" character

and it should work.

 

On a side-note, POSIX-style regular expressions (those using the ereg_*() functions) are deprecated in PHP as of v5.3. You might want to think about switching to the PCRE functions (preg_match() in this case).

[Psycho]

Also, if you are using PHP 5.2.0 or later you might want to try using the filter_var() function with the FILTER_VALIDATE_EMAIL flag. http://us.php.net/manual/en/filter.examples.validation.php

 

I have not used it myself to test how comprehensive it is.

[fortnox007]

Also, if you are using PHP 5.2.0 or later you might want to try using the filter_var() function with the FILTER_VALIDATE_EMAIL flag. http://us.php.net/manual/en/filter.examples.validation.php

 

I have not used it myself to test how comprehensive it is.

Good point, thx for sharing your detailed code also.

Cheers!