note 35837 deleted from function.gethostbyname by didou
| From: | didou@php.net | Date: | Fri, 27 Feb 2004 15:58:04 +0000 |
| Subject: | note 35837 deleted from function.gethostbyname by didou | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-65892@lists.php.net to get a copy of this message | ||
Note Submitter: cwilliams@aerospace.state.al.us
----
// Author: Chris Williams
// Date: 9/16/03
// Description: This function takes a scalar value as an argument,
// validates it with a reg exp, then sees if the domain exists
// Usage: $var = checkEmail($var);
function checkEmail($Email) {
//Debug or not?
$debug = 0;
//Do the basic Reg Exp Matching for simple validation
if (eregi("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$]", $Email)) {
return FALSE;
}
//split the Email Up for Server validation
list($Username, $Domain) = split("@",$Email);
//If you get an mx record then this is a valid email domain
if(getmxrr($Domain, $MXHost)) {
return TRUE;
if($debug == 1) { echo "$Domain<BR>getmxrr worked."; }
}
else {
//else use the domain given to try and connect on port 25
//if you can connect then it's a valid domain and that's good enough
if(checkdnsrr($Domain.'.', "A")) {
$ip = gethostbyname($Domain);
//This is to counteract the effects of the Verisign .com .net unregistered email grab
if($ip == "64.94.110.11") {
if($debug == 1) { echo "$Domain<BR>is invalid. Verisign returned."; }
return FALSE;
}
else {
if($debug == 1) { echo "$Domain<BR>fsockopen worked. Verisign wasn't the
IP."; }
return TRUE;
}
}
else {
return FALSE;
}
}
}