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;
}
function check_form()
{
global $HTTP_POST_VARS, $error, $print_again;
$error['name'] = false;
if($_POST["name"]=="") {
$error['name'] = true;
$print_again = true;
$message="The name field is empty<br>";
}
if(!check_email_address($_POST['email'])) {
$error['email'] = true;
$print_again = true;
$message.="Either Field Empty or Invalid Email ID <br>";
}
if($print_again) {
show_form();
} else {
show_form();
$message="All Fields are valid <br>
Now, In this way you can validate the other textfield as well<br>
You can insert data into table";
}
echo "$message";
}
