PHP Classes

File: dchk.php

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File: dchk.php
Role: Class source
Content type: text/plain
Description: Main class file, containing comments and examples
Class: DCHK
Check the availability of a domain name with whois
Author: By
Last change:
Date: 17 years ago
Size: 4,909 bytes
 

Contents

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<?php

/**
 * DCHK - PHP Class to check if a domain name exists or is available
 *
 * Tested and working on PHP 4.3.2 and higher
 *
 * LICENSE: This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License v2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @author Giulio Bai <slide.wow@gmail.com>
 * @copyright (C)2007 Giulio Bai - GNU GPL
 * @license http://www.gnu.org/licenses/gpl.html GNU General public License
 * @version 1.0
 * @link http://hewle.com
 */
 

/**
 * A class to check the presence of a domain name, having any extension.
 *
 * Example of use (1):
 * The following code will check for the domain name example.com and, if available,
 * will return the link to the registration through godaddy.com
 * You can change the server used to check domains availability and the site
 * from where buy the domain name by specifing them in the method call.
 * <code>
 * include_once('dchk.php');
 *
 * $free = new DCHK();
 * if($free->check_domain("example.com"))
 * // domain available
 * else
 * // Domain already registered!
 * </code>
 *
 * Example of use (2):
 * Form to check domain names
 * <code>
 * <?php
 * if (isset($_POST['submit'])) {
 * $domain = $_POST['domain'];
 * $ext = $_POST['extension'];
 * $full_name = $domain . '.' . $ext;
 *
 * include_once('dchk.php');
 *
 * $free = new DCHK();
 * if($free->check_domain("example.com, , , 1")) // Prints the register link also
 * } else {
 * <form>
 * Check for a domain name:
 * <input type="text" name="domain" />
 * <select name="extension">
 * <option value="com">.com</option>
 * <option value="org">.net</option>
 * <option value="net">.org</option>
 * <option value="biz">.biz</option>
 * </select>
 * <br />
 * <input type="submit" name ="submit" value="Check now!"/>
 * </form>
 * ?>
 * }
 * </code>
 *
 * @author Giulio Bai <slide.wow@gmail.com>
 * @copyright (C)2007 Giulio Bai
 * @license http://www.gnu.org/licenses/gpl.html GNU General Public License
 * @version 1.0
 * @link http://hewle.com
 */
class DCHK
{
   
   
/**
     * Server from which check the domain availability.
     *
     * @var string
     */
   
var $server = "whois.networksolutions.com";
   
   
/**
     * Port to access the server
     *
     * @var int
     */
   
var $port = 43;
   
   
/**
     * Registration link. Displayed if the domain is available.
     *
     * You can replace this link with another one, at your choise, but remember the
     * domain name will be added in substitution of '$domain'
     *
     * @var string
     */
   
var $reg_link = "http://order.1and1.co.uk/xml/order/domaincheck?__sendingdata=1&__pageflow=Order&multicheck.Domain=$domain";
   
   
/**
     * No match string. Usually you do not need to modify.
     *
     * @var string
     */
   
var $nomatch = "No match for";
   
   
/**
     * Output of the test.
     *
     * @var string
     */
   
var $output = "";
   
   
   
/**
     * Checks the domain avaiability and, if specified, prints the result.
     *
     * @param string $domain the domain to check
     * @param string $server the server used for the checking
     * @param int $port the port needed to reach the server
     * @param bool $print set to 1 if you want the outputs printed
     *
     * @return bool returns true if the domain is available, false otherwise
     */
   
function check_domain($domain, $server = $this->server, $port = $this->port, $print = 0)
    {
       
$this->server = $server;
       
$this->port = $port;
       
       
$e = explode(".", $domain);
       
        if (
count($e) != 2) return true; // Strange domain name, uh?
       
       
$domain = $e[0];
       
$ext = $e[1];

        if((
$sc = fsockopen($this->server, $this->port)) == false)
            return
true;

       
fputs($sc, "$domain . $ext\n");

        while(!
feof($sc))
           
$this->output .= fgets($sc, 128);
       
       
fclose($sc);
       
        if (
eregi($this->nomatch, $this->output)) {
            if (
$print)
                echo
'<a href="' . $this->reg_link .'">Register now ' . $domain . '!</a>';
           
            return
true;
        } else {
            if (
$print)
                echo
'Sorry, the domain ' . $domain . ' is already registered!';
               
            return
false;
        }
    }

}

?>