php-doc-en/reference/sockets/functions/socket-set-block.xml

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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.socket-set-block">
 <refnamediv>
  <refname>socket_set_block</refname>
  <refpurpose>Sets blocking mode on a socket resource</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>socket_set_block</methodname>
   <methodparam><type>resource</type><parameter>socket</parameter></methodparam>
  </methodsynopsis>
  <para>
   The <function>socket_set_block</function> function removes the 
   <constant>O_NONBLOCK</constant> flag on the socket specified by the 
   <parameter>socket</parameter> parameter.
  </para>
  <para>
   When an operation (e.g. receive, send, connect, accept, ...) is performed on 
   a blocking socket, the script will pause its execution until it receives
   a signal or it can perform the operation.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>socket</parameter></term>
     <listitem>
      <para>
       A valid socket resource created with <function>socket_create</function>
       or <function>socket_accept</function>.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>socket_set_block</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$socket = socket_create_listen(1223);
socket_set_block($socket);

socket_accept($socket);
?>
]]>
    </programlisting>
    <para>
     This example creates a listening socket on all interfaces on port 1223 and
     sets the socket to <constant>O_BLOCK</constant> mode. 
     <function>socket_accept</function> will hang until there is a connection
     to accept.
    </para>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>socket_set_nonblock</function></member>
    <member><function>socket_set_option</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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