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    <p>The function <a href="http://php.net/parse_url" rel="nofollow noreferrer"><code>parse_url()</code></a> requires a valid URL. In this case <code>test.web.tv</code> isn't valid, so <a href="http://php.net/parse_url" rel="nofollow noreferrer"><code>parse_url()</code></a> won't give you the expected results. In order to get around this, you could first check if the URL has the <code>http://</code> prefix, and if it doesn't, manually prepend it. That way, you can get around the limitation of <a href="http://php.net/parse_url" rel="nofollow noreferrer"><code>parse_url()</code></a>.</p> <p>However, I think it'd be better to use the following function. </p> <pre><code>function getDomain($url) { if (!preg_match("~^(?:f|ht)tps?://~i", $url)) { $url = "http://" . $url; } $domain = implode('.', array_slice(explode('.', parse_url($url, PHP_URL_HOST)), -2)); return $domain; } </code></pre> <p>Explanation:</p> <ul> <li>The given URL's passed to <a href="http://php.net/parse_url" rel="nofollow noreferrer"><code>parse_url()</code></a> with the <code>PHP_URL_HOST</code> flag and the full host is obtained</li> <li>It's exploded with <code>.</code> as a delimiter</li> <li>The last two pieces of the array is sliced -- ie. the domain name</li> <li>It's joined back using <a href="http://php.net/implode" rel="nofollow noreferrer"><code>implode()</code></a></li> </ul> <p>Test:</p> <pre><code>echo getDomain('test.web.tv'); </code></pre> <p>Output:</p> <pre><code>web.tv </code></pre> <p><a href="http://codepad.org/nMHmiK40" rel="nofollow noreferrer"><strong>Demo!</strong></a></p> <p>Note: It's a modified version of my own answer <a href="https://stackoverflow.com/a/18881399/1438393">here</a> combined with Alix's answer <a href="https://stackoverflow.com/questions/2762061/">here</a>.</p> <p>This function currently doesn't work for <code>.co.uk</code> domain extensions -- you can easily add a check and change the <code>array_slice</code> function accordingly.</p>
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    1. POAbout find domain name
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    1. COYes but this code is not working for test.hotmail.com.mx :(
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