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

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

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>Runkit_Sandbox_Parent</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN198720"
></A
><P
>    (no version information, might be only in CVS)</P
>Runkit_Sandbox_Parent&nbsp;--&nbsp;
   Runkit Anti-Sandbox Class
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN198723"
></A
><H2
>说明</H2
>void <B
CLASS="methodname"
>Runkit_Sandbox_Parent::__construct</B
> ( void  )<BR
></BR
><P
>&#13;   Instantiating the <B
CLASS="classname"
>Runkit_Sandbox_Parent</B
>
   class from within a sandbox environment created from the
   <B
CLASS="classname"
>Runkit_Sandbox</B
> class provides some
   (controlled) means for a sandbox child to access its parent.
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>对沙盒的支持（是函数
<A
HREF="function.runkit-lint.html"
><B
CLASS="function"
>runkit_lint()</B
></A
>、<A
HREF="function.runkit-lint-file.html"
><B
CLASS="function"
>runkit_lint_file()</B
></A
>
和 Runkit_Sandbox 类所必须的）仅在 PHP 5.1 中，或在加过特别补丁的 PHP 5.0
中可用，并需要启用线程安全。请阅读 runkit 包中的 README 文件以了解更多信息。
</P
></BLOCKQUOTE
></DIV
><P
>&#13;   In order for any of the <B
CLASS="classname"
>Runkit_Sandbox_Parent</B
>
   features to function.  Support must be enabled on a per-sandbox basis
   by enabling the <TT
CLASS="literal"
>parent_access</TT
> flag from the parent's
   context.
  </P
><TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN198739"
></A
><P
><B
>例 1. Working with variables in a sandbox</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$sandbox </font><font color="#007700">= new </font><font color="#0000BB">Runkit_Sandbox</font><font color="#007700">();<br /></font><font color="#0000BB">$sandbox</font><font color="#007700">[</font><font color="#DD0000">'parent_access'</font><font color="#007700">] = </font><font color="#0000BB">true</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN198742"
></A
><H2
>Accessing the Parent's Variables</H2
><P
>&#13;   Just as with sandbox variable access, a sandbox parent's
   variables may be read from and written to as properties of
   the <B
CLASS="classname"
>Runkit_Sandbox_Parent</B
> class.
   Read access to parental variables may be enabled with
   the <TT
CLASS="literal"
>parent_read</TT
> setting (in addition
   to the base <TT
CLASS="literal"
>parent_access</TT
> setting).
   Write access, in turn, is enabled through the
   <TT
CLASS="literal"
>parent_write</TT
> setting.
  </P
><P
>&#13;   Unlike sandbox child variable access, the variable scope
   is not limited to globals only.  By setting the
   <TT
CLASS="literal"
>parent_scope</TT
> setting to an appropriate
   integer value, other scopes in the active call stack may
   be inspected instead.  A value of 0 (Default) will direct
   variable access at the global scope.  1 will point variable
   access at whatever variable scope was active at the time the
   current block of sandbox code was executed.  Higher values
   progress back through the functions that called the functions
   that led to the sandbox executing code that tried to access
   its own parent's variables.
  </P
><TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN198751"
></A
><P
><B
>例 2. Accessing parental variables</B
></P
><TABLE
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BGCOLOR="#E0E0E0"
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$php </font><font color="#007700">= new </font><font color="#0000BB">Runkit_Sandbox</font><font color="#007700">();<br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_access'</font><font color="#007700">] = </font><font color="#0000BB">true</font><font color="#007700">;<br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_read'</font><font color="#007700">] = </font><font color="#0000BB">true</font><font color="#007700">;<br /><br /></font><font color="#0000BB">$test </font><font color="#007700">= </font><font color="#DD0000">"Global"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">-&gt;</font><font color="#0000BB">eval</font><font color="#007700">(</font><font color="#DD0000">'$PARENT = new Runkit_Sandbox_Parent;'</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_scope'</font><font color="#007700">] = </font><font color="#0000BB">0</font><font color="#007700">;<br /></font><font color="#0000BB">one</font><font color="#007700">();<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_scope'</font><font color="#007700">] = </font><font color="#0000BB">1</font><font color="#007700">;<br /></font><font color="#0000BB">one</font><font color="#007700">();<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_scope'</font><font color="#007700">] = </font><font color="#0000BB">2</font><font color="#007700">;<br /></font><font color="#0000BB">one</font><font color="#007700">();<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_scope'</font><font color="#007700">] = </font><font color="#0000BB">3</font><font color="#007700">;<br /></font><font color="#0000BB">one</font><font color="#007700">();<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_scope'</font><font color="#007700">] = </font><font color="#0000BB">4</font><font color="#007700">;<br /></font><font color="#0000BB">one</font><font color="#007700">();<br /><br /></font><font color="#0000BB">$php</font><font color="#007700">[</font><font color="#DD0000">'parent_scope'</font><font color="#007700">] = </font><font color="#0000BB">5</font><font color="#007700">;<br /></font><font color="#0000BB">one</font><font color="#007700">();<br /><br />function </font><font color="#0000BB">one</font><font color="#007700">() {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$test </font><font color="#007700">= </font><font color="#DD0000">"one()"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">two</font><font color="#007700">();<br />}<br /><br />function </font><font color="#0000BB">two</font><font color="#007700">() {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$test </font><font color="#007700">= </font><font color="#DD0000">"two()"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">three</font><font color="#007700">();<br />}<br /><br />function </font><font color="#0000BB">three</font><font color="#007700">() {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$test </font><font color="#007700">= </font><font color="#DD0000">"three()"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#DD0000">'php'</font><font color="#007700">]-&gt;</font><font color="#0000BB">eval</font><font color="#007700">(</font><font color="#DD0000">'var_dump($PARENT-&gt;test);'</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>string(6) "Global"
string(7) "three()"
string(5) "two()"
string(5) "one()"
string(6) "Global"
string(6) "Global"</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN198756"
></A
><H2
>Calling the Parent's Functions</H2
><P
>&#13;   Just as with sandbox access, a sandbox may access its parents
   functions providing that the proper settings have been enabled.
   Enabling <TT
CLASS="literal"
>parent_call</TT
> will allow the sandbox
   to call all functions available to the parent scope.  Language
   constructs are each controlled by their own setting:
   <A
HREF="function.print.html"
><B
CLASS="function"
>print()</B
></A
> and <A
HREF="function.echo.html"
><B
CLASS="function"
>echo()</B
></A
> are
   enabled with <TT
CLASS="literal"
>parent_echo</TT
>.
   <A
HREF="function.die.html"
><B
CLASS="function"
>die()</B
></A
> and <A
HREF="function.exit.html"
><B
CLASS="function"
>exit()</B
></A
> are
   enabled with <TT
CLASS="literal"
>parent_die</TT
>.
   <A
HREF="function.eval.html"
><B
CLASS="function"
>eval()</B
></A
> is enabled with <TT
CLASS="literal"
>parent_eval</TT
>
   while <A
HREF="function.include.html"
><B
CLASS="function"
>include()</B
></A
>, <A
HREF="function.include-once.html"
><B
CLASS="function"
>include_once()</B
></A
>,
   <A
HREF="function.require.html"
><B
CLASS="function"
>require()</B
></A
>, and <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
>
   are enabled through <TT
CLASS="literal"
>parent_include</TT
>.
  </P
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