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>readline_callback_handler_install</H1
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><A
NAME="AEN192319"
></A
><P
> (PHP 5 >= 5.1.0RC1)</P
>readline_callback_handler_install -- Initializes the readline callback interface and terminal, prints the prompt and returns immediately</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN192322"
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><H2
>Descrição</H2
>bool <B
CLASS="methodname"
>readline_callback_handler_install</B
> ( string prompt, callback callback )<BR
></BR
><P
> Sets up a readline callback interface then prints
<CODE
CLASS="parameter"
>prompt</CODE
> and immediately returns.
Calling this function twice without removing the previous
callback interface will automatically and conveniently overwrite the old
interface.
</P
><P
> The callback feature is useful when combined with
<A
HREF="function.stream-select.html"
><B
CLASS="function"
>stream_select()</B
></A
> as it allows interleaving of IO and
user input, unlike <A
HREF="function.readline.html"
><B
CLASS="function"
>readline()</B
></A
>.
</P
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><DIV
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><A
NAME="AEN192338"
></A
><H2
>Parâmetros</H2
><P
> <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>prompt</CODE
></DT
><DD
><P
> The prompt message.
</P
></DD
><DT
><CODE
CLASS="parameter"
>callback</CODE
></DT
><DD
><P
> The <CODE
CLASS="parameter"
>callback</CODE
> function takes one parameter; the
user input returned.
</P
></DD
></DL
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN192353"
></A
><H2
>Valores de retornado</H2
><P
> Retorna <TT
CLASS="constant"
><B
>TRUE</B
></TT
> em caso de sucesso ou <TT
CLASS="constant"
><B
>FALSE</B
></TT
> em falhas.
</P
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><A
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></A
><H2
>Exemplos</H2
><P
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><TD
><DIV
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><A
NAME="AEN192361"
></A
><P
><B
>Exemplo 1. Readline Callback Interface Example</B
></P
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><code><font color="#000000">
<font color="#0000BB"><?php<br /></font><font color="#007700">function </font><font color="#0000BB">rl_callback</font><font color="#007700">(</font><font color="#0000BB">$ret</font><font color="#007700">)<br />{<br /> global </font><font color="#0000BB">$c</font><font color="#007700">, </font><font color="#0000BB">$prompting</font><font color="#007700">;<br /><br /> echo </font><font color="#DD0000">"You entered: $ret</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> </font><font color="#0000BB">$c</font><font color="#007700">++;<br /><br /> if (</font><font color="#0000BB">$c </font><font color="#007700">> </font><font color="#0000BB">10</font><font color="#007700">) {<br /> </font><font color="#0000BB">$prompting </font><font color="#007700">= </font><font color="#0000BB">false</font><font color="#007700">;<br /> </font><font color="#0000BB">readline_callback_handler_remove</font><font color="#007700">();<br /> } else {<br /> </font><font color="#0000BB">readline_callback_handler_install</font><font color="#007700">(</font><font color="#DD0000">"</font><font color="#007700">[</font><font color="#DD0000">$c</font><font color="#007700">]</font><font color="#DD0000"> Enter something: "</font><font color="#007700">, </font><font color="#DD0000">'rl_callback'</font><font color="#007700">);<br /> }<br />}<br /><br /></font><font color="#0000BB">$c </font><font color="#007700">= </font><font color="#0000BB">1</font><font color="#007700">;<br /></font><font color="#0000BB">$prompting </font><font color="#007700">= </font><font color="#0000BB">true</font><font color="#007700">;<br /><br /></font><font color="#0000BB">readline_callback_handler_install</font><font color="#007700">(</font><font color="#DD0000">"</font><font color="#007700">[</font><font color="#DD0000">$c</font><font color="#007700">]</font><font color="#DD0000"> Enter something: "</font><font color="#007700">, </font><font color="#DD0000">'rl_callback'</font><font color="#007700">);<br /><br />while (</font><font color="#0000BB">$prompting</font><font color="#007700">) {<br /> </font><font color="#0000BB">$w </font><font color="#007700">= </font><font color="#0000BB">NULL</font><font color="#007700">;<br /> </font><font color="#0000BB">$e </font><font color="#007700">= </font><font color="#0000BB">NULL</font><font color="#007700">;<br /> </font><font color="#0000BB">$n </font><font color="#007700">= </font><font color="#0000BB">stream_select</font><font color="#007700">(</font><font color="#0000BB">$r </font><font color="#007700">= array(</font><font color="#0000BB">STDIN</font><font color="#007700">), </font><font color="#0000BB">$w</font><font color="#007700">, </font><font color="#0000BB">$e</font><font color="#007700">, </font><font color="#0000BB">null</font><font color="#007700">);<br /> if (</font><font color="#0000BB">$n </font><font color="#007700">&& </font><font color="#0000BB">in_array</font><font color="#007700">(</font><font color="#0000BB">STDIN</font><font color="#007700">, </font><font color="#0000BB">$r</font><font color="#007700">)) {<br /> </font><font color="#FF8000">// read a character, will call the callback when a newline is entered<br /> </font><font color="#0000BB">readline_callback_read_char</font><font color="#007700">();<br /> }<br />}<br /><br />echo </font><font color="#DD0000">"Prompting disabled. All done.\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
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>
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><DIV
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><A
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></A
><H2
>Veja também</H2
><P
> <P
></P
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><A
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><B
CLASS="function"
>readline_callback_handler_remove()</B
></A
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><TD
><A
HREF="function.readline-callback-read-char.html"
><B
CLASS="function"
>readline_callback_read_char()</B
></A
></TD
></TR
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><TD
><A
HREF="function.stream-select.html"
><B
CLASS="function"
>stream_select()</B
></A
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