Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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><H1
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>dio_open</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN36183"
></A
><P
>    (PHP 4 &#62;= 4.2.0, PHP 5 &#60;= 5.0.4)</P
>dio_open&nbsp;--&nbsp;
   Opens a new filename with specified permissions of flags and
   creation permissions of mode
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN36186"
></A
><H2
>说明</H2
>resource <B
CLASS="methodname"
>dio_open</B
> ( string filename, int flags [, int mode] )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>dio_open()</B
> opens a file and returns a new file
   descriptor for it.  
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN36202"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>filename</CODE
></DT
><DD
><P
>&#13;       The opened file.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>flags</CODE
></DT
><DD
><P
>&#13;       The <CODE
CLASS="parameter"
>flags</CODE
> parameter can also include any
       combination of the following flags:
       <P
></P
><UL
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_CREAT</B
></TT
> - creates the file, if it doesn't
          already exist.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_EXCL</B
></TT
> - if both, <TT
CLASS="constant"
><B
>O_CREAT</B
></TT
>
          and <TT
CLASS="constant"
><B
>O_EXCL</B
></TT
> are set, <B
CLASS="function"
>dio_open()</B
>
          fails, if the file already exists.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_TRUNC</B
></TT
> - if the file exists, and its opened 
          for write access, the file will be truncated to zero length.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_APPEND</B
></TT
> - write operations write data at the
          end of the file.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_NONBLOCK</B
></TT
> - sets non blocking mode.
         </P
></LI
></UL
>
      </P
></DD
><DT
><CODE
CLASS="parameter"
>mode</CODE
></DT
><DD
><P
>&#13;       If <CODE
CLASS="parameter"
>flags</CODE
> is <TT
CLASS="constant"
><B
>O_CREAT</B
></TT
>,
       <CODE
CLASS="parameter"
>mode</CODE
> will set the mode of the file
       (creation permissions).  
       <P
></P
><UL
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_RDONLY</B
></TT
> - opens the file for read access.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_WRONLY</B
></TT
> - opens the file for write access.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>O_RDWR</B
></TT
> - opens the file for both reading and
          writing.
         </P
></LI
></UL
>
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN36254"
></A
><H2
>返回值</H2
><P
>&#13;   A file descriptor or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on error.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN36258"
></A
><H2
>范例</H2
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><TD
><DIV
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><A
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></A
><P
><B
>例 1. Opening a file descriptor</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$fd </font><font color="#007700">= </font><font color="#0000BB">dio_open</font><font color="#007700">(</font><font color="#DD0000">'/dev/ttyS0'</font><font color="#007700">, </font><font color="#0000BB">O_RDWR </font><font color="#007700">| </font><font color="#0000BB">O_NOCTTY </font><font color="#007700">| </font><font color="#0000BB">O_NONBLOCK</font><font color="#007700">);<br /><br /></font><font color="#0000BB">dio_close</font><font color="#007700">(</font><font color="#0000BB">$fd</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN36263"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><TR
><TD
><A
HREF="function.dio-close.html"
><B
CLASS="function"
>dio_close()</B
></A
></TD
></TR
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><P
></P
>
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