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

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

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>xattr_set</H1
><DIV
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><A
NAME="AEN239568"
></A
><P
>    (PECL)</P
>xattr_set&nbsp;--&nbsp;
   Set an extended attribute
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN239571"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>xattr_set</B
> ( string filename, string name, string value [, int flags] )<BR
></BR
><P
>&#13;   This function sets the value of an extended attribute of a file.
  </P
><P
>扩展的属性有两个不同的名字空间：user
和 root 名字空间。user 名字空间对所有用户均有效，而 root 名字空间仅对拥有 root 权限的用户有效。xattr
默认在 user 名字空间上进行操作，但是可以使用 <CODE
CLASS="parameter"
>flags</CODE
> 参数进行更改。</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN239591"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>filename</CODE
></DT
><DD
><P
>&#13;       The file in which we set the attribute.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>name</CODE
></DT
><DD
><P
>&#13;       The name of the extended attribute. This attribute will be created if 
       it doesn't exist or replaced otherwise. You can change this behaviour 
       by using the <CODE
CLASS="parameter"
>flags</CODE
> parameter.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>value</CODE
></DT
><DD
><P
>&#13;       The value of the attribute.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>flags</CODE
></DT
><DD
><P
>&#13;       <DIV
CLASS="table"
><A
NAME="AEN239616"
></A
><P
><B
>表 1. Supported xattr flags</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><TBODY
><TR
><TD
><TT
CLASS="constant"
><B
>XATTR_CREATE</B
></TT
></TD
><TD
>Function will fail if extended attribute already exists.</TD
></TR
><TR
><TD
><TT
CLASS="constant"
><B
>XATTR_REPLACE</B
></TT
></TD
><TD
>Function will fail if extended attribute doesn't exist.</TD
></TR
><TR
><TD
><TT
CLASS="constant"
><B
>XATTR_DONTFOLLOW</B
></TT
></TD
><TD
>Do not follow the symbolic link but operate on symbolic link itself.</TD
></TR
><TR
><TD
><TT
CLASS="constant"
><B
>XATTR_ROOT</B
></TT
></TD
><TD
>Set attribute in root (trusted) namespace. Requires root privileges.</TD
></TR
></TBODY
></TABLE
></DIV
>
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN239636"
></A
><H2
>返回值</H2
><P
>&#13;   如果成功则返回 <TT
CLASS="constant"
><B
>TRUE</B
></TT
>，失败则返回 <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN239641"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN239644"
></A
><P
><B
>例 1. Sets extended attributes on .wav file</B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$file </font><font color="#007700">= </font><font color="#DD0000">'my_favourite_song.wav'</font><font color="#007700">;<br /></font><font color="#0000BB">xattr_set</font><font color="#007700">(</font><font color="#0000BB">$file</font><font color="#007700">, </font><font color="#DD0000">'Artist'</font><font color="#007700">, </font><font color="#DD0000">'Someone'</font><font color="#007700">);<br /></font><font color="#0000BB">xattr_set</font><font color="#007700">(</font><font color="#0000BB">$file</font><font color="#007700">, </font><font color="#DD0000">'My ranking'</font><font color="#007700">, </font><font color="#DD0000">'Good'</font><font color="#007700">);<br /></font><font color="#0000BB">xattr_set</font><font color="#007700">(</font><font color="#0000BB">$file</font><font color="#007700">, </font><font color="#DD0000">'Listen count'</font><font color="#007700">, </font><font color="#DD0000">'34'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* ... other code ... */<br /><br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"You've played this song %d times"</font><font color="#007700">, </font><font color="#0000BB">xattr_get</font><font color="#007700">(</font><font color="#0000BB">$file</font><font color="#007700">, </font><font color="#DD0000">'Listen count'</font><font color="#007700">)); <br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></TABLE
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN239647"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><A
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><B
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>xattr_get()</B
></A
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><B
CLASS="function"
>xattr_remove()</B
></A
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>
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