域註冊表api集成在php

Question

我想整合一個API與我的網站之一，這是我的高級給出的任務。API是關於搜索域名已經存在與否..請幫助我在這個問題上 請給我一個例子，我可以參考。我的網站是在PHP中。

Answer 1

[編輯2]作爲@Poe提到了他的意見，gethostbyname可能是一個更好的解決方案，因爲它適用於任何頂級域名，因爲它執行DNS查詢，而不是使用whois查詢，也更易於實施和可能更快：

<?php 
$ip = gethostbyname('example.com'); 
if (strstr($ip,"example.com")){ 
    echo "No match for domain example.com<br />\n"; 
} else { 
    echo "Domain found. Query output: <br />\n".$ip; 
} 
?> 

反正域名可以註冊，但它不與任何計算機（例如，雖然這是非常罕見的，你可能會得到www.example.com而不是例如分辨率。 com）

[編輯]我以前沒有發佈過這個消息，因爲我在連接到端口43上的whois.internic.net以執行whois查詢時遇到了一些問題（以爲他們已經關閉了該服務）。無論如何，這是一個基於fsockopen的解決方案，我認爲它比我在使用CGI web腳本之前給出的解決方案好得多，也更簡單。希望它可以幫助（用法：myqueryscript.php域= domainiwanttocheck.com？）：

<?php 
$fp = fsockopen("199.7.58.74", 43, $errno, $errstr, 30); 
if (!$fp) { 
    echo "$errstr ($errno)<br />\n"; 
} else { 
    $query = $_GET['domain']."\r\n"; 
    $answer= ''; 
    fwrite($fp, $query); 
    while (!feof($fp)) { 
     $answer .= fgets($fp, 128)."<br />"; 
    } 
    fclose($fp); 
    if (strstr($answer,"No match for")){ 
     echo "No match for domain ".$_GET['domain']."<br />\n"; 
    } else { 
     echo "Domain found. Query output: <br />\n".$answer; 
    } 
} 
?> 

從InterNIC的網站，這是HTML代碼來實現的whois查詢：

<form method="get" action="http://reports.internic.net/cgi/whois" name="my_form"> 
      <input type="text" size="30" name="whois_nic" maxlength="80"> 
      <br> 
      <input type="radio" name="type" value="domain" checked> 
      Domain<font size="-1"> (ex. internic.net) 
      <br> 
      <input type="radio" name="type" value="registrar"> 
      Registrar<font size="-1"> (ex. ABC Registrar, Inc.) 
      <br> 
      <input type="radio" name="type" value="nameserver"> 
      Nameserver (ex. NS.EXAMPLE.COM or 192.16.0.192)<br> 
      <br> 
      <input type="submit" value="Submit"> 
    </form> 

這意味着你可以發送一個像這樣的whois查詢：http://reports.internic.net/cgi/whois?whois_nic=domainiwanttocheck.com&type=domain

您可以從腳本發送查詢並將響應存儲在DOMDocument對象上。檢出：http://www.php.net/manual/en/domdocument.loadhtml.php

如果您使用此方法查找域並且域不存在，您將得到字符串No match for domain。使用strpos

如果該域存在的反應看這一點，您可以過濾響應包括有關注冊機構的信息等，這將是HTML標籤的響應<pre>的內容：

<pre> 

Whois Server Version 2.0 

Domain names in the .com and .net domains can now be registered 
with many different competing registrars. Go to http://www.internic.net 
for detailed information. 

    Domain Name: GOOGLE.COM 
    Registrar: MARKMONITOR INC. 
    Whois Server: whois.markmonitor.com 
    Referral URL: http://www.markmonitor.com 
    Name Server: NS1.GOOGLE.COM 
    Name Server: NS2.GOOGLE.COM 
    Name Server: NS3.GOOGLE.COM 
    Name Server: NS4.GOOGLE.COM 
    Status: clientDeleteProhibited 
    Status: clientTransferProhibited 
    Status: clientUpdateProhibited 
    Status: serverDeleteProhibited 
    Status: serverTransferProhibited 
    Status: serverUpdateProhibited 
    Updated Date: 20-jul-2011 
    Creation Date: 15-sep-1997 
    Expiration Date: 14-sep-2020 

>>> Last update of whois database: Sat, 25 Aug 2012 10:15:09 UTC <<< 

NOTICE: The expiration date displayed in this record is the date the 
registrar's sponsorship of the domain name registration in the registry is 
currently set to expire. This date does not necessarily reflect the expiration 
date of the domain name registrant's agreement with the sponsoring 
registrar. Users may consult the sponsoring registrar's Whois database to 
view the registrar's reported date of expiration for this registration. 

TERMS OF USE: You are not authorized to access or query our Whois 
database through the use of electronic processes that are high-volume and 
automated except as reasonably necessary to register domain names or 
modify existing registrations; the Data in VeriSign Global Registry 
Services' ("VeriSign") Whois database is provided by VeriSign for 
information purposes only, and to assist persons in obtaining information 
about or related to a domain name registration record. VeriSign does not 
guarantee its accuracy. By submitting a Whois query, you agree to abide 
by the following terms of use: You agree that you may use this Data only 
for lawful purposes and that under no circumstances will you use this Data 
to: (1) allow, enable, or otherwise support the transmission of mass 
unsolicited, commercial advertising or solicitations via e-mail, telephone, 
or facsimile; or (2) enable high volume, automated, electronic processes 
that apply to VeriSign (or its computer systems). The compilation, 
repackaging, dissemination or other use of this Data is expressly 
prohibited without the prior written consent of VeriSign. You agree not to 
use electronic processes that are automated and high-volume to access or 
query the Whois database except as reasonably necessary to register 
domain names or modify existing registrations. VeriSign reserves the right 
to restrict your access to the Whois database in its sole discretion to ensure 
operational stability. VeriSign may restrict or terminate your access to the 
Whois database for failure to abide by these terms of use. VeriSign 
reserves the right to modify these terms at any time. 

The Registry database contains ONLY .COM, .NET, .EDU domains and 
Registrars. 
     </pre> 

另外，看看這個相關的問題：Who provides a WHOIS API?