(PHP 4, PHP 5, PHP 7, PHP 8)
checkdnsrr — Belirtilen bir konak adı veya IP adresi için DNS sorgusu yapar
konak ile ilgili tür
türündeki kayıtlar için DNS sorgusu yapar.
konak
konak noktalı sayısal gösterimli bir IP adresi
veya bir konak ismi olabilir.
tür
tür değeri şunlardan biri olabilir: A, MX, NS,
SOA, PTR, CNAME, AAAA, A6, SRV, NAPTR, TXT veya ANY.
Kayıtlar bulunduğu takdirde true, hiç kayıt yoksa veya bir hata oluşmuşsa
false döner.
Bilginize:
Bu işlevin henüz gerçeklenmediği PHP sürümlerini çalıştıran Windows platformlarında » PEAR » Net_DNS sınıfını deneyin.
criffoh at gmail dot com is right. Before you check domain, you must convert to ascii with idn_to_ascii function:
http://us2.php.net/manual/en/function.idn-to-ascii.php .
var_dump(checkdnsrr('ñandu.cl', 'A')); // returns false
var_dump(checkdnsrr(idn_to_ascii('ñandu.cl'), 'A')); // return trueImportant Warning:
You need to add a dot to the end of the host name to make a fully qualified domain name.
To see why, try executing the following pieces of code:
$d1="gmail.con";
$d2="gmail.con.";
$r1=checkdnsrr($d1, "MX");
$r2=checkdnsrr($d2, "MX");
var_dump($r1);
var_dump($r2);
You will see that without the dot it claims that the domain "gmail.con" is valid.
Note that if you time the "checkdnsrr()" calls you will also see it takes longer without the dot because it treats it as a relative domain and does several tries based on the host name it is running on.
NB: in case you're interested, being treated as a relative domain explains what is happening. If your host is "example.com" the relative domain will eventually resolve to "gmail.con.com." which can be looked up, hence it wrongly claims "gmail.con" existsI always think you should state the blindingly obvious.
A function that contains checkdnsrr will return false without an internet connection.
So in a production environment you need an active internet connection to return a true result with a valid email address.