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
><A
NAME="function.posix-access"
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>posix_access</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN182772"
></A
><P
>    (PHP 5 &#62;= 5.1.0RC1)</P
>posix_access&nbsp;--&nbsp;
   Determine accessibility of a file
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN182775"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>posix_access</B
> ( string file [, int mode] )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>posix_access()</B
> checks the user's permission of a file.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN182788"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>file</CODE
></DT
><DD
><P
>&#13;        The name of the file to be tested.
       </P
></DD
><DT
><CODE
CLASS="parameter"
>mode</CODE
></DT
><DD
><P
>&#13;        A mask consisting of one or more of <TT
CLASS="constant"
><B
>POSIX_F_OK</B
></TT
>,
        <TT
CLASS="constant"
><B
>POSIX_R_OK</B
></TT
>, <TT
CLASS="constant"
><B
>POSIX_W_OK</B
></TT
> and
        <TT
CLASS="constant"
><B
>POSIX_X_OK</B
></TT
>. Defaults to
        <TT
CLASS="constant"
><B
>POSIX_F_OK</B
></TT
>.
       </P
><P
>&#13;        <TT
CLASS="constant"
><B
>POSIX_R_OK</B
></TT
>, <TT
CLASS="constant"
><B
>POSIX_W_OK</B
></TT
> and
        <TT
CLASS="constant"
><B
>POSIX_X_OK</B
></TT
> request checking whether the file
        exists and has read, write and execute permissions, respectively.
        <TT
CLASS="constant"
><B
>POSIX_F_OK</B
></TT
> just requests checking for the
        existence of the file.
       </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN182812"
></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="AEN182817"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN182820"
></A
><P
><B
>例 1. <B
CLASS="function"
>posix_access()</B
> example</B
></P
><P
>&#13;     This example will check if the $file is readable and writable, otherwise
     will print an error message.
    </P
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$file </font><font color="#007700">= </font><font color="#DD0000">'some_file'</font><font color="#007700">;<br /><br />if (</font><font color="#0000BB">posix_access</font><font color="#007700">(</font><font color="#0000BB">$file</font><font color="#007700">, </font><font color="#0000BB">POSIX_R_OK </font><font color="#007700">| </font><font color="#0000BB">POSIX_W_OK</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'The file is readable and writable!'</font><font color="#007700">;<br /><br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$error </font><font color="#007700">= </font><font color="#0000BB">posix_get_last_error</font><font color="#007700">();<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"Error $error: " </font><font color="#007700">. </font><font color="#0000BB">posix_strerror</font><font color="#007700">(</font><font color="#0000BB">$error</font><font color="#007700">);<br />}<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN182825"
></A
><H2
>注释</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>当<A
HREF="features.safe-mode.html"
>安全模式</A
>被激活时，PHP
将检查被操作的文件或者目录是否与正在执行的脚本有相同的 UID（所有者）。</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN182830"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TBODY
><TR
><TD
><A
HREF="function.posix-get-last-error.html"
><B
CLASS="function"
>posix_get_last_error()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.posix-strerror.html"
><B
CLASS="function"
>posix_strerror()</B
></A
></TD
></TR
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><P
></P
>
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