simple PHP email validation

Placebo

i want to take in multiple emails

[PHP]<form method="POST" action="test.php">

<textarea rows="10" cols="25" name="mails"></textarea>
<input type="submit" value="submit" name="submit">
</form>[/PHP]

[PHP]
if (isset($_POST)) {
$all = $_REQUEST["mails"];

$emails = explode("\n", $all);

foreach ($emails as $email) {

if(!preg_match('/^[_A-z0-9-]+((\.|\+)[_A-z0-9-]+)*@[A-z0-9-]+(\.[A-z0-9-]+)*(\.[A-z]{2,4})$/',$email)){


echo "wrong";

}

else
{

echo "right";
}

}

}

}



[/PHP]

I tried putting !preg_match into a function returning 0 and 1 and calling the function within the foreach loop.

Doesnt work, seems to display wrong for any first few emails, and correct for last.?

matrim

Placebo wrote: »

i want to take in multiple emails

[PHP]<form method="POST" action="test.php">

<textarea rows="10" cols="25" name="mails"></textarea>
<input type="submit" value="submit" name="submit">
</form>[/PHP]

[PHP]
if (isset($_POST)) {
$all = $_REQUEST["mails"];

$emails = explode("\n", $all);

foreach ($emails as $email) {

if(!preg_match('/^[_A-z0-9-]+((\.|\+)[_A-z0-9-]+)*@[A-z0-9-]+(\.[A-z0-9-]+)*(\.[A-z]{2,4})$/',$email)){


echo "wrong";

}

else
{

echo "right";
}

}

}

}



[/PHP]

I tried putting !preg_match into a function returning 0 and 1 and calling the function within the foreach loop.

Doesnt work, seems to display wrong for any first few emails, and correct for last.?

Here's a function that I use

function valid_email($str)
{
   return ( ! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE;
}

It also might be worth running each email through trim() before checking it

Placebo

thanks matrim, there was probably white space during split operation.
So its working now


better method
[PHP] function check_email_address($email) {
// First, we check that there's one @ symbol, and that the lengths are right
if (!ereg("^[^@]{1,64}@[^@]{1,255}$", $email)) {
// Email invalid because wrong number of characters in one section, or wrong number of @ symbols.
return false;
}
// Split it into sections to make life easier
$email_array = explode("@", $email);
$local_array = explode(".", $email_array[0]);
for ($i = 0; $i < sizeof($local_array); $i++) {
if (!ereg("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$", $local_array[$i])) {
return false;
}
}
if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1])) { // Check if domain is IP. If not, it should be valid domain name
$domain_array = explode(".", $email_array[1]);
if (sizeof($domain_array) < 2) {
return false; // Not enough parts to domain
}
for ($i = 0; $i < sizeof($domain_array); $i++) {
if (!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$", $domain_array[$i])) {
return false;
}
}
}
return true;
}
[/PHP]