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

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

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>Phar-&#62;startBuffering</H1
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NAME="AEN179532"
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><P
>    (no version information, might be only in CVS)</P
>Phar-&#62;startBuffering&nbsp;--&nbsp;Start buffering Phar write operations, do not modify the Phar object on disk</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN179535"
></A
><H2
>说明</H2
>void <B
CLASS="methodname"
>Phar-&#62;startBuffering</B
> ( void  )<BR
></BR
><P
>&#13;   Although technically unnecessary, the <B
CLASS="function"
>startBuffering()</B
> method
   can provide a significant performance boost when creating or modifying a
   Phar archive with a large number of files.  Ordinarily, every time a file
   within a Phar archive is created or modified in any way, the entire Phar
   archive will be recreated with the changes.  In this way, the archive will
   be up-to-date with the activity performed on it.
  </P
><P
>&#13;   However, this can be unnecessary when simply creating a new Phar archive,
   when it would make more sense to write the entire archive out at once.
   Similarly, it is often necessary to make a series of changes and to ensure
   that they all are possible before making any changes on disk, similar to the
   relational database concept of transactions.  the
   <B
CLASS="function"
>startBuffering()</B
>/<B
CLASS="function"
>stopBuffering()</B
> pair
   of methods is provided for this purpose.
  </P
><P
>&#13;   Phar write buffering is per-archive, buffering active for the
   <TT
CLASS="literal"
>foo.phar</TT
> Phar archive does not affect changes
   to the <TT
CLASS="literal"
>bar.phar</TT
> Phar archive.
  </P
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><DIV
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><A
NAME="AEN179549"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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><B
>例 1. A <B
CLASS="function"
>Phar-&#62;startBuffering()</B
> example</B
></P
><P
>&#13;    </P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// make sure it doesn't exist<br /></font><font color="#007700">@</font><font color="#0000BB">unlink</font><font color="#007700">(</font><font color="#DD0000">'brandnewphar.phar'</font><font color="#007700">);<br /></font><font color="#0000BB">try </font><font color="#007700">{<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$p </font><font color="#007700">= new </font><font color="#0000BB">Phar</font><font color="#007700">(</font><font color="#0000BB">dirname</font><font color="#007700">(</font><font color="#0000BB">__FILE__</font><font color="#007700">) . </font><font color="#DD0000">'/brandnewphar.phar'</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#DD0000">'brandnewphar.phar'</font><font color="#007700">);<br />} </font><font color="#0000BB">catch </font><font color="#007700">(</font><font color="#0000BB">Exception $e</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Could not create phar:'</font><font color="#007700">, </font><font color="#0000BB">$e</font><font color="#007700">;<br />}<br />echo </font><font color="#DD0000">'The new phar has ' </font><font color="#007700">. </font><font color="#0000BB">$p</font><font color="#007700">-&gt;</font><font color="#0000BB">count</font><font color="#007700">() . </font><font color="#DD0000">" entries\n"</font><font color="#007700">;<br /></font><font color="#0000BB">$p</font><font color="#007700">-&gt;</font><font color="#0000BB">startBuffering</font><font color="#007700">();<br /></font><font color="#0000BB">$p</font><font color="#007700">[</font><font color="#DD0000">'file.txt'</font><font color="#007700">] = </font><font color="#DD0000">'hi'</font><font color="#007700">;<br /></font><font color="#0000BB">$p</font><font color="#007700">[</font><font color="#DD0000">'file2.txt'</font><font color="#007700">] = </font><font color="#DD0000">'there'</font><font color="#007700">;<br /></font><font color="#0000BB">$p</font><font color="#007700">[</font><font color="#DD0000">'file2.txt'</font><font color="#007700">]-&gt;</font><font color="#0000BB">setCompressedGZ</font><font color="#007700">();<br /></font><font color="#0000BB">$p</font><font color="#007700">[</font><font color="#DD0000">'file3.txt'</font><font color="#007700">] = </font><font color="#DD0000">'babyface'</font><font color="#007700">;<br /></font><font color="#0000BB">$p</font><font color="#007700">[</font><font color="#DD0000">'file3.txt'</font><font color="#007700">]-&gt;</font><font color="#0000BB">setMetaData</font><font color="#007700">(</font><font color="#0000BB">42</font><font color="#007700">);<br /></font><font color="#0000BB">$p</font><font color="#007700">-&gt;</font><font color="#0000BB">setStub</font><font color="#007700">(</font><font color="#DD0000">"&lt;?php<br />function __autoload($class)<br /></font><font color="#007700">{</font><font color="#DD0000"><br />&nbsp;&nbsp;&nbsp;&nbsp;include 'phar://myphar.phar/' . str_replace('_', '/', $class) . '.php';<br /></font><font color="#007700">}</font><font color="#DD0000"><br />Phar::mapPhar('myphar.phar');<br />include 'phar://myphar.phar/startup.php';<br />__HALT_COMPILER();"</font><font color="#007700">);<br /></font><font color="#0000BB">$p</font><font color="#007700">-&gt;</font><font color="#0000BB">stopBuffering</font><font color="#007700">();<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN179557"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><A
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><B
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>Phar-&#62;stopBuffering()</B
></A
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><B
CLASS="function"
>Phar-&#62;isBuffering()</B
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