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<title>Set service proxy callback for signal</title>
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<h1 class="refname">gupnp_service_proxy_callback_set</h1>
<p class="verinfo">(PECL gupnp >= 0.1.0)</p><p class="refpurpose"><span class="refname">gupnp_service_proxy_callback_set</span> — <span class="dc-title">Set service proxy callback for signal</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.gupnp-service-proxy-callback-set-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>gupnp_service_proxy_callback_set</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$proxy</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$signal</code></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">$callback</code></span>
[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$arg</code></span>
] )</div>
<p class="para rdfs-comment">
Set service proxy callback for signal.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.gupnp-service-proxy-callback-set-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">proxy</code></dt>
<dd>
<p class="para">
A service proxy identifier.
</p>
</dd>
<dt>
<code class="parameter">signal</code></dt>
<dd>
<p class="para">
The value of signal.
<dl>
<dt>
<strong><code>GUPNP_SIGNAL_SUBSCRIPTION_LOST</code></strong></dt>
<dd>
<span class="simpara">
Emitted whenever the subscription to this service has been lost due
to an error condition.
</span>
</dd>
</dl>
</p>
</dd>
<dt>
<code class="parameter">callback</code></dt>
<dd>
<p class="para">
The callback function for the certain signal. Typically, callback function
takes on two parameters. <code class="parameter">error</code> parameter's message
being the first, and the <code class="parameter">arg</code> is second.
</p>
</dd>
<dt>
<code class="parameter">arg</code></dt>
<dd>
<p class="para">
User data for <code class="parameter">callback</code>.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.gupnp-service-proxy-callback-set-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 errors" id="refsect1-function.gupnp-service-proxy-callback-set-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Issues E_WARNING either with not valid callback function or with not valid signal.
</p>
</div>
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