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<title>Finds whether a variable is a resource</title>
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<h1 class="refname">is_resource</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">is_resource</span> — <span class="dc-title">
Finds whether a variable is a resource
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.is-resource-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>is_resource</strong></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$var</code></span>
)</div>
<p class="para rdfs-comment">
Finds whether the given variable is a resource.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.is-resource-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">var</code></em></span>
<dd>
<p class="para">
The variable being evaluated.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.is-resource-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if <em><code class="parameter">var</code></em> is a <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>,
<strong><code>FALSE</code></strong> otherwise.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.is-resource-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-5264">
<p><strong>Example #1 <span class="function"><strong>is_resource()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />$db_link </span><span style="color: #007700">= @</span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_pass'</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">is_resource</span><span style="color: #007700">(</span><span style="color: #0000BB">$db_link</span><span style="color: #007700">)) {<br /> die(</span><span style="color: #DD0000">'Can\'t connect : ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.is-resource-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><a href="language.types.resource.html" class="link">The resource-type documentation</a></li>
<li class="member"> <span class="function"><a href="function.get-resource-type.html" class="function" rel="rdfs-seeAlso">get_resource_type()</a> - Returns the resource type</span></li>
</ul>
</p>
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