<!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>Sets socket options for the socket</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.socket-set-nonblock.html">socket_set_nonblock</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.socket-setopt.html">socket_setopt</a></div> <div class="up"><a href="ref.sockets.html">Socket Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.socket-set-option" class="refentry"> <div class="refnamediv"> <h1 class="refname">socket_set_option</h1> <p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">socket_set_option</span> — <span class="dc-title">Sets socket options for the socket</span></p> </div> <div class="refsect1 description" id="refsect1-function.socket-set-option-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>socket_set_option</strong></span> ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$socket</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$level</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$optname</code></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$optval</code></span> )</div> <p class="para rdfs-comment"> The <span class="function"><strong>socket_set_option()</strong></span> function sets the option specified by the <code class="parameter">optname</code> parameter, at the specified protocol <code class="parameter">level</code>, to the value pointed to by the <code class="parameter">optval</code> parameter for the <code class="parameter">socket</code>. </p> </div> <div class="refsect1 parameters" id="refsect1-function.socket-set-option-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <code class="parameter">socket</code></dt> <dd> <p class="para"> A valid socket resource created with <span class="function"><a href="function.socket-create.html" class="function">socket_create()</a></span> or <span class="function"><a href="function.socket-accept.html" class="function">socket_accept()</a></span>. </p> </dd> <dt> <code class="parameter">level</code></dt> <dd> <p class="para"> The <code class="parameter">level</code> parameter specifies the protocol level at which the option resides. For example, to retrieve options at the socket level, a <code class="parameter">level</code> parameter of <strong><code>SOL_SOCKET</code></strong> would be used. Other levels, such as TCP, can be used by specifying the protocol number of that level. Protocol numbers can be found by using the <span class="function"><a href="function.getprotobyname.html" class="function">getprotobyname()</a></span> function. </p> </dd> <dt> <code class="parameter">optname</code></dt> <dd> <p class="para"> The available socket options are the same as those for the <span class="function"><a href="function.socket-get-option.html" class="function">socket_get_option()</a></span> function. </p> </dd> <dt> <code class="parameter">optval</code></dt> <dd> <p class="para"> The option value. </p> </dd> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.socket-set-option-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 examples" id="refsect1-function.socket-set-option-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-5741"> <p><strong>Example #1 <span class="function"><strong>socket_set_option()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$socket </span><span style="color: #007700">= </span><span style="color: #0000BB">socket_create</span><span style="color: #007700">(</span><span style="color: #0000BB">AF_INET</span><span style="color: #007700">, </span><span style="color: #0000BB">SOCK_STREAM</span><span style="color: #007700">, </span><span style="color: #0000BB">SOL_TCP</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">is_resource</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Unable to create socket: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /><br />if (!</span><span style="color: #0000BB">socket_set_option</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">, </span><span style="color: #0000BB">SOL_SOCKET</span><span style="color: #007700">, </span><span style="color: #0000BB">SO_REUSEADDR</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Unable to set option on socket: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /><br />if (!</span><span style="color: #0000BB">socket_bind</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">, </span><span style="color: #DD0000">'127.0.0.1'</span><span style="color: #007700">, </span><span style="color: #0000BB">1223</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Unable to bind socket: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">$rval </span><span style="color: #007700">= </span><span style="color: #0000BB">socket_get_option</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">, </span><span style="color: #0000BB">SOL_SOCKET</span><span style="color: #007700">, </span><span style="color: #0000BB">SO_REUSEADDR</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$rval </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'Unable to get socket option: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />} else if (</span><span style="color: #0000BB">$rval </span><span style="color: #007700">!== </span><span style="color: #0000BB">0</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'SO_REUSEADDR is set on socket !' </span><span style="color: #007700">. </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-function.socket-set-option-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><span class="function"><a href="function.socket-create.html" class="function" rel="rdfs-seeAlso">socket_create()</a> - Create a socket (endpoint for communication)</span></li> <li class="member"><span class="function"><a href="function.socket-bind.html" class="function" rel="rdfs-seeAlso">socket_bind()</a> - Binds a name to a socket</span></li> <li class="member"><span class="function"><a href="function.socket-strerror.html" class="function" rel="rdfs-seeAlso">socket_strerror()</a> - Return a string describing a socket error</span></li> <li class="member"><span class="function"><a href="function.socket-last-error.html" class="function" rel="rdfs-seeAlso">socket_last_error()</a> - Returns the last error on the socket</span></li> <li class="member"><span class="function"><a href="function.socket-get-option.html" class="function" rel="rdfs-seeAlso">socket_get_option()</a> - Gets socket options for the socket</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.socket-set-nonblock.html">socket_set_nonblock</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.socket-setopt.html">socket_setopt</a></div> <div class="up"><a href="ref.sockets.html">Socket Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>