<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Prepare an event</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.event-new.html">event_new</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.pcntl.html">PCNTL</a></div> <div class="up"><a href="ref.libevent.html">Libevent Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.event-set" class="refentry"> <div class="refnamediv"> <h1 class="refname">event_set</h1> <p class="verinfo">(PECL libevent >= 0.0.1)</p><p class="refpurpose"><span class="refname">event_set</span> — <span class="dc-title">Prepare an event</span></p> </div> <div class="refsect1 description" id="refsect1-function.event-set-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><a href="event.set.html" class="methodname">event_set</a></span> ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$event</code></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$fd</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$events</code></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$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"> Prepares the event to be used in <span class="function"><a href="event.add.html" class="function">event_add()</a></span>. The event is prepared to call the function specified by the <em><code class="parameter">callback</code></em> on the events specified in parameter <em><code class="parameter">events</code></em>, which is a set of the following flags: <strong><code>EV_TIMEOUT</code></strong>, <strong><code>EV_SIGNAL</code></strong>, <strong><code>EV_READ</code></strong>, <strong><code>EV_WRITE</code></strong> and <strong><code>EV_PERSIST</code></strong>. </p> <p class="para"> If <strong><code>EV_SIGNAL</code></strong> bit is set in parameter <em><code class="parameter">events</code></em>, the <em><code class="parameter">fd</code></em> is interpreted as signal number. </p> <p class="para"> After initializing the event, use <span class="function"><a href="function.event-base-set.html" class="function">event_base_set()</a></span> to associate the event with its event base. </p> <p class="para"> In case of matching event, these three arguments are passed to the <em><code class="parameter">callback</code></em> function: <dl> <dt> <span class="term"><em><code class="parameter">fd</code></em></span> <dd> <p class="para"> Signal number or resource indicating the stream. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">events</code></em></span> <dd> <p class="para"> A flag indicating the event. Consists of the following flags: <strong><code>EV_TIMEOUT</code></strong>, <strong><code>EV_SIGNAL</code></strong>, <strong><code>EV_READ</code></strong>, <strong><code>EV_WRITE</code></strong> and <strong><code>EV_PERSIST</code></strong>. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">arg</code></em></span> <dd> <p class="para"> Optional parameter, previously passed to <span class="function"><a href="event.set.html" class="function">event_set()</a></span> as <em><code class="parameter">arg</code></em>. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 parameters" id="refsect1-function.event-set-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">event</code></em></span> <dd> <p class="para"> Valid event resource. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">fd</code></em></span> <dd> <p class="para"> Valid PHP stream resource. The stream must be castable to file descriptor, so you most likely won't be able to use any of filtered streams. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">events</code></em></span> <dd> <p class="para"> A set of flags indicating the desired event, can be <strong><code>EV_READ</code></strong> and/or <strong><code>EV_WRITE</code></strong>. The additional flag <strong><code>EV_PERSIST</code></strong> makes the event to persist until <span class="function"><a href="event.del.html" class="function">event_del()</a></span> is called, otherwise the callback is invoked only once. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">callback</code></em></span> <dd> <p class="para"> Callback function to be called when the matching event occurs. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">arg</code></em></span> <dd> <p class="para"> Optional callback parameter. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.event-set-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> <span class="function"><a href="event.set.html" class="function">event_set()</a></span> returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on error. </p> </div> <div class="refsect1 changelog" id="refsect1-function.event-set-changelog"> <h3 class="title">Changelog</h3> <table class="doctable informaltable"> <thead> <tr> <th>Version</th> <th>Description</th> </tr> </thead> <tbody class="tbody"> <tr> <td>0.0.4</td> <td> <strong><code>EV_SIGNAL</code></strong> support was added. </td> </tr> </tbody> </table> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.event-new.html">event_new</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.pcntl.html">PCNTL</a></div> <div class="up"><a href="ref.libevent.html">Libevent Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>