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<title>Fetch all the SNMP objects from an agent</title>
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<h1 class="refname">snmpwalk</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">snmpwalk</span> — <span class="dc-title">Fetch all the <acronym title="Simple Network Management Protocol">SNMP</acronym> objects from an agent</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.snmpwalk-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">array</span> <span class="methodname"><strong>snmpwalk</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$hostname</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$community</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$object_id</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$timeout</code><span class="initializer"> = 1000000</span></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$retries</code><span class="initializer"> = 5</span></span>
]] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>snmpwalk()</strong></span> function is used to read all the values from
an <acronym title="Simple Network Management Protocol">SNMP</acronym> agent specified by the <em><code class="parameter">hostname</code></em>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.snmpwalk-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">hostname</code></em></span>
<dd>
<p class="para">
The SNMP agent (server).
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">community</code></em></span>
<dd>
<p class="para">
The read community.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">object_id</code></em></span>
<dd>
<p class="para">
If <strong><code>NULL</code></strong>, <em><code class="parameter">object_id</code></em> is taken as the root of
the <acronym title="Simple Network Management Protocol">SNMP</acronym> objects tree and all objects under that tree are returned as
an array.
</p>
<p class="para">
If <em><code class="parameter">object_id</code></em> is specified, all the <acronym title="Simple Network Management Protocol">SNMP</acronym> objects
below that <em><code class="parameter">object_id</code></em> are returned.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">timeout</code></em></span>
<dd>
<p class="para">
The number of microseconds until the first timeout.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">retries</code></em></span>
<dd>
<p class="para">The number of times to retry if timeouts occur.</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.snmpwalk-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns an array of <acronym title="Simple Network Management Protocol">SNMP</acronym> object values starting from the
<em><code class="parameter">object_id</code></em> as root or <strong><code>FALSE</code></strong> on error.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.snmpwalk-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4571">
<p><strong>Example #1 <span class="function"><strong>snmpwalk()</strong></span> Example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$a </span><span style="color: #007700">= </span><span style="color: #0000BB">snmpwalk</span><span style="color: #007700">(</span><span style="color: #DD0000">"127.0.0.1"</span><span style="color: #007700">, </span><span style="color: #DD0000">"public"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">); <br /><br />foreach (</span><span style="color: #0000BB">$a </span><span style="color: #007700">as </span><span style="color: #0000BB">$val</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$val</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
<p class="para">
Above function call would return all the <acronym title="Simple Network Management Protocol">SNMP</acronym> objects from the
<acronym title="Simple Network Management Protocol">SNMP</acronym> agent running on localhost. One can step through the values
with a loop
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.snmpwalk-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.snmprealwalk.html" class="function" rel="rdfs-seeAlso">snmprealwalk()</a> - Return all objects including their respective object ID within the specified one</span></li>
</ul>
</p>
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