Source of: /manual/en/function.gethostbyname.php
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<div id="function.gethostbyname" class="refentry">
<div class="refnamediv">
<h1 class="refname">gethostbyname</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">gethostbyname</span> — <span class="dc-title">
Get the IPv4 address corresponding to a given Internet host name
</span></p>
</div>
<a name="function.gethostbyname.description"></a><div class="refsect1 description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><b>gethostbyname</b></span>
( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$hostname</tt></span>
)</div>
<p class="para rdfs-comment">
Returns the IPv4 address of the Internet host specified by
<i><tt class="parameter">hostname</tt></i>
.
</p>
</div>
<a name="function.gethostbyname.parameters"></a><div class="refsect1 parameters">
<h3 class="title">Parameters</h3>
<p class="para">
</p><dl>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">hostname</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
The host name.
</p>
</dd>
</dl>
<p>
</p>
</div>
<a name="function.gethostbyname.returnvalues"></a><div class="refsect1 returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the IPv4 address or a string containing the unmodified
<i><tt class="parameter">hostname</tt></i>
on failure.
</p>
</div>
<a name="function.gethostbyname.examples"></a><div class="refsect1 examples">
<h3 class="title">Examples</h3>
<p class="para">
</p><div class="example">
<p><b>Example #1 A simple <b>gethostbyname()</b> example</b></p>
<div class="example-contents programlisting">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$ip </span><span style="color: #007700">= </span><span style="color: #0000BB">gethostbyname</span><span style="color: #007700">(</span><span style="color: #DD0000">'www.example.com'</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">$ip</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div><p>
</p>
</div>
<a name="function.gethostbyname.seealso"></a><div class="refsect1 seealso">
<h3 class="title">See Also</h3>
<p class="para">
</p><ul class="simplelist">
<li class="member"><a href="function.gethostbyaddr.php" class="function" rel="rdfs-seeAlso">gethostbyaddr()</a> - Get the Internet host name corresponding to a given IP address</li>
<li class="member"><a href="function.gethostbynamel.php" class="function" rel="rdfs-seeAlso">gethostbynamel()</a> - Get a list of IPv4 addresses corresponding to a given Internet host
name</li>
<li class="member"><a href="function.inet-pton.php" class="function" rel="rdfs-seeAlso">inet_pton()</a> - Converts a human readable IP address to its packed in_addr representation</li>
<li class="member"><a href="function.inet-ntop.php" class="function" rel="rdfs-seeAlso">inet_ntop()</a> - Converts a packed internet address to a human readable representation</li>
</ul><p>
</p>
</div>
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