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

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

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>gzseek</TITLE
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><H1
><A
NAME="function.gzseek"
></A
>gzseek</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN252073"
></A
><P
>    (PHP 3, PHP 4, PHP 5)</P
>gzseek&nbsp;--&nbsp;Seek on a gz-file pointer</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN252076"
></A
><H2
>说明</H2
>int <B
CLASS="methodname"
>gzseek</B
> ( resource zp, int offset )<BR
></BR
><P
>&#13;   Sets the file position indicator for the given file pointer to the
   given offset byte into the file stream. Equivalent to calling (in C)
   <TT
CLASS="literal"
>gzseek(zp, offset, SEEK_SET)</TT
>.
  </P
><P
>&#13;   If the file is opened for reading, this function is emulated but
   can be extremely slow. If the file is opened for writing, only
   forward seeks are supported; <B
CLASS="function"
>gzseek()</B
> then compresses
   a sequence of zeroes up to the new starting position.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN252091"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>zp</CODE
></DT
><DD
><P
>&#13;       The gz-file pointer. It must be valid, and must point to a file
       successfully opened by <A
HREF="function.gzopen.html"
><B
CLASS="function"
>gzopen()</B
></A
>.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>offset</CODE
></DT
><DD
><P
>&#13;       The seeked offset.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN252106"
></A
><H2
>返回值</H2
><P
>&#13;   Upon success, returns 0; otherwise, returns -1. Note that seeking
   past EOF is not considered an error.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN252109"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN252112"
></A
><P
><B
>例 1. <B
CLASS="function"
>gzseek()</B
> example</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$gz </font><font color="#007700">= </font><font color="#0000BB">gzopen</font><font color="#007700">(</font><font color="#DD0000">'somefile.gz'</font><font color="#007700">, </font><font color="#DD0000">'r'</font><font color="#007700">);<br /></font><font color="#0000BB">gzseek</font><font color="#007700">(</font><font color="#0000BB">$gz</font><font color="#007700">,</font><font color="#0000BB">2</font><font color="#007700">);<br />echo </font><font color="#0000BB">gzgetc</font><font color="#007700">(</font><font color="#0000BB">$gz</font><font color="#007700">);<br /></font><font color="#0000BB">gzclose</font><font color="#007700">(</font><font color="#0000BB">$gz</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></DIV
></TD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN252116"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.gztell.html"
><B
CLASS="function"
>gztell()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.gzrewind.html"
><B
CLASS="function"
>gzrewind()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
  </P
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