archived-doc-pt-br/reference/misc/functions/sapi-windows-set-ctrl-handler.xml

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<refentry xml:id="function.sapi-windows-set-ctrl-handler" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>sapi_windows_set_ctrl_handler</refname>
  <refpurpose>Define ou remove um manipulador de evento CTRL</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>sapi_windows_set_ctrl_handler</methodname>
   <methodparam><type class="union"><type>callable</type><type>null</type></type><parameter>handler</parameter></methodparam>
   <methodparam choice="opt"><type>bool</type><parameter>add</parameter><initializer>&true;</initializer></methodparam>
  </methodsynopsis>
  <para>
   Define ou remove um manipulador de evento <literal>CTRL</literal>, que permite que os processos
   CLI do Windows interceptem ou ignorem eventos <literal>CTRL+C</literal> e
   <literal>CTRL+BREAK</literal>. Observe que em ambientes multi-thread,
   isto só é possível quando a função é chamada da thread principal.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>handler</parameter></term>
    <listitem>
     <para>
      Uma função de chamada de retorno a ser definida ou removida. Se definida, esta função será chamada
      sempre que um evento
      <keycombo action='simul'>
       <keycap>CTRL</keycap>
       <keycap>C</keycap>
      </keycombo>
      ou
      <keycombo action='simul'>
       <keycap>CTRL</keycap>
       <keycap>BREAK</keycap>
      </keycombo>
      ocorrer.
      A função deve ter a seguinte assinatura:
      <methodsynopsis>
       <type>void</type><methodname>handler</methodname>
       <methodparam><type>int</type><parameter>event</parameter></methodparam>
      </methodsynopsis>
      <variablelist>
       <varlistentry>
        <term><parameter>event</parameter></term>
        <listitem>
         <simpara>
          O evento <keycap>CTRL</keycap> que foi recebido;
          pode ser <constant>PHP_WINDOWS_EVENT_CTRL_C</constant>
          ou <constant>PHP_WINDOWS_EVENT_CTRL_BREAK</constant>.
         </simpara>
        </listitem>
       </varlistentry>
      </variablelist>
      Definir um <parameter>handler</parameter> como &null; faz com que o processo ignore eventos
      <keycombo action='simul'>
       <keycap>CTRL</keycap>
       <keycap>C</keycap>
      </keycombo>,
      mas não os eventos
      <keycombo action='simul'>
       <keycap>CTRL</keycap>
       <keycap>BREAK</keycap>
      </keycombo>
      .
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>add</parameter></term>
    <listitem>
     <para>
      Se for igual a &true;, o manipulador é definido. Se for &false;, o manipulador é removido.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

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

 <refsect1 role="examples">
  &reftitle.examples;
  <example xml:id="sapi-windows-set-ctrl-handler.example.basic">
   <title>Uso Básico de <function>sapi_windows_set_ctrl_handler</function></title>
   <para>
    Este exemplo mostra como interceptar eventos <literal>CTRL</literal>.
   </para>
   <programlisting role="php">
<![CDATA[
<?php
function ctrl_handler(int $event)
{
    switch ($event) {
        case PHP_WINDOWS_EVENT_CTRL_C:
            echo "CTRL+C foi pressionado\n";
            break;
        case PHP_WINDOWS_EVENT_CTRL_BREAK:
            echo "CTRL+BREAK foi pressionado\n";
            break;
    }
}

sapi_windows_set_ctrl_handler('ctrl_handler');
while (true); // repetição infinita, para que o manipulador seja disparado
?>
]]>
   </programlisting>
  </example>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <simplelist>
   <member><function>sapi_windows_generate_ctrl_event</function></member>
  </simplelist>
 </refsect1>

</refentry>
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