ini.core.html

php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容

    </table>

   </p>
   <p class="para">Here&#039;s a short explanation of
the configuration directives.</p>
   <p class="para">
    <dl>

     <dt id="ini.realpath-cache-size">
      <span class="term">
       <i><tt class="parameter">realpath_cache_size</tt></i>

       <a href="language.types.integer.html" class="type integer">integer</a>
      </span>

      <dd>

       <p class="para">
        Determines the size of the realpath cache to be used by PHP. This
        value should be increased on systems where PHP opens many files, to
        reflect the quantity of the file operations performed.
       </p>
      </dd>

     </dt>

     <dt id="ini.realpath-cache-ttl">
      <span class="term">
       <i><tt class="parameter">realpath_cache_ttl</tt></i>

       <a href="language.types.integer.html" class="type integer">integer</a>
      </span>

      <dd>

       <p class="para">
        Duration of time (in seconds) for which to cache realpath information
        for a given file or directory. For systems with rarely changing files,
        consider increasing the value.
       </p>
      </dd>

     </dt>

    </dl>

   </p>
  </div>

  <div id="ini.sect.data-handling" class="section">
   <h2 class="title">Data Handling</h2>
   <p class="para">
    <table border="5">
     <caption><b>Data Handling Configuration Options</b></caption>
     <colgroup>

      <thead valign="middle">
       <tr valign="middle">
        <th colspan="1">Name</th>
        <th colspan="1">Default</th>
        <th colspan="1">Changeable</th>
        <th colspan="1">Changelog</th>
       </tr>

      </thead>

      <tbody valign="middle" class="tbody">
       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">track_vars</td>
        <td colspan="1" rowspan="1" align="left">&quot;On&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_??</td>
        <td class="empty">&nbsp;</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">arg_separator.output</td>
        <td colspan="1" rowspan="1" align="left">&quot;&amp;&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL</td>
        <td colspan="1" rowspan="1" align="left">Available since PHP 4.0.5.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">arg_separator.input</td>
        <td colspan="1" rowspan="1" align="left">&quot;&amp;&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">Available since PHP 4.0.5.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">variables_order</td>
        <td colspan="1" rowspan="1" align="left">&quot;EGPCS&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL in PHP &lt;= 5.0.5.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">request_order</td>
        <td colspan="1" rowspan="1" align="left">&quot;&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_SYSTEM|PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">Available since PHP 5.3.0</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">auto_globals_jit</td>
        <td colspan="1" rowspan="1" align="left">&quot;1&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">Available since PHP 5.0.0.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">register_globals</td>
        <td colspan="1" rowspan="1" align="left">&quot;0&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL in PHP &lt;= 4.2.3.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">register_argc_argv</td>
        <td colspan="1" rowspan="1" align="left">&quot;1&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL in PHP &lt;= 4.2.3.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">register_long_arrays</td>
        <td colspan="1" rowspan="1" align="left">&quot;1&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">Available since PHP 5.0.0.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">post_max_size</td>
        <td colspan="1" rowspan="1" align="left">&quot;8M&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_SYSTEM in PHP &lt;= 4.2.3. Available since PHP 4.0.3.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">gpc_order</td>
        <td colspan="1" rowspan="1" align="left">&quot;GPC&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL</td>
        <td class="empty">&nbsp;</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">auto_prepend_file</td>
        <td colspan="1" rowspan="1" align="left">NULL</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL in PHP &lt;= 4.2.3.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">auto_append_file</td>
        <td colspan="1" rowspan="1" align="left">NULL</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL in PHP &lt;= 4.2.3.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">default_mimetype</td>
        <td colspan="1" rowspan="1" align="left">&quot;text/html&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL</td>
        <td class="empty">&nbsp;</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">default_charset</td>
        <td colspan="1" rowspan="1" align="left">&quot;&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL</td>
        <td class="empty">&nbsp;</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">always_populate_raw_post_data</td>
        <td colspan="1" rowspan="1" align="left">&quot;0&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_ALL in PHP &lt;= 4.2.3. Available since PHP 4.1.0.</td>
       </tr>

       <tr valign="middle">
        <td colspan="1" rowspan="1" align="left">allow_webdav_methods</td>
        <td colspan="1" rowspan="1" align="left">&quot;0&quot;</td>
        <td colspan="1" rowspan="1" align="left">PHP_INI_PERDIR</td>
        <td class="empty">&nbsp;</td>
       </tr>

      </tbody>
     </colgroup>

    </table>

   </p>

   <p class="para">Here&#039;s a short explanation of
the configuration directives.</p>

   <p class="para">
    <dl>

     <dt id="ini.track-vars">
      <span class="term">
       <i><tt class="parameter">track_vars</tt></i>

       <a href="language.types.boolean.html" class="type boolean">boolean</a>
      </span>

      <dd>

       <p class="para">
        If enabled, then Environment, GET, POST, Cookie, and Server
        variables can be found in the global associative arrays
        <var class="varname"><a href="reserved.variables.environment.html" class="classname">$_ENV</a></var>,
        <var class="varname"><a href="reserved.variables.get.html" class="classname">$_GET</a></var>,
        <var class="varname"><a href="reserved.variables.post.html" class="classname">$_POST</a></var>,
        <var class="varname"><a href="reserved.variables.cookies.html" class="classname">$_COOKIE</a></var>, and
        <var class="varname"><a href="reserved.variables.server.html" class="classname">$_SERVER</a></var>.
       </p>
       <p class="para">
        Note that as of PHP 4.0.3, <code class="systemitem systemitem">track_vars</code>
 is always turned on.
       </p>
      </dd>

     </dt>


     <dt id="ini.arg-separator.output">
      <span class="term">
       <i><tt class="parameter">arg_separator.output</tt></i>

       <a href="language.types.string.html" class="type string">string</a>
      </span>

      <dd>

       <p class="para">
        The separator used in PHP generated URLs to separate arguments.
       </p>
      </dd>

     </dt>


     <dt id="ini.arg-separator.input">
      <span class="term">
       <i><tt class="parameter">arg_separator.input</tt></i>

       <a href="language.types.string.html" class="type string">string</a>
      </span>

      <dd>

       <p class="para">
        List of separator(s) used by PHP to parse input URLs into variables.
       </p>
       <blockquote><p><b class="note">Note</b>: 
        
         Every character in this directive is considered as separator!
        <br />
       </p></blockquote>
      </dd>

     </dt>


     <dt id="ini.variables-order">
      <span class="term">
       <i><tt class="parameter">variables_order</tt></i>

       <a href="language.types.string.html" class="type string">string</a>
      </span>

      <dd>

       <p class="para">
        Sets the order of the EGPCS (<i>E</i>nvironment,
        <i>G</i>et, <i>P</i>ost,
        <i>C</i>ookie, and <i>S</i>erver) variable
        parsing. For example, if variables_order
        is set to <i>&quot;SP&quot;</i> then PHP will create the
        <a href="language.variables.predefined.html" class="link">superglobals</a> <var class="varname"><a href="reserved.variables.server.html" class="classname">$_SERVER</a></var> and
        <var class="varname"><a href="reserved.variables.post.html" class="classname">$_POST</a></var>, but not create
        <var class="varname"><a href="reserved.variables.environment.html" class="classname">$_ENV</a></var>, <var class="varname"><a href="reserved.variables.get.html" class="classname">$_GET</a></var>, and
        <var class="varname"><a href="reserved.variables.cookies.html" class="classname">$_COOKIE</a></var>.  Setting to &quot;&quot; means no
        <a href="language.variables.predefined.html" class="link">superglobals</a> will be set.
       </p>
       <p class="para">
        If the deprecated
        <a href="ini.core.html#ini.register-globals" class="link">register_globals</a>
        directive is on (removed as of PHP 6.0.0), then variables_order also
        configures the order the <i>ENV</i>,
        <i>GET</i>, <i>POST</i>,
        <i>COOKIE</i> and <i>SERVER</i> variables
        are populated in global scope. So for example if variables_order
        is set to <i>&quot;EGPCS&quot;</i>, register_globals is enabled,
        and both <var class="varname"><a href="reserved.variables.get.html" class="classname">$_GET['action']</a></var> and
        <var class="varname"><a href="reserved.variables.post.html" class="classname">$_POST['action']</a></var> are set, then
        <var class="varname">$action</var> will contain the value of
        <var class="varname"><a href="reserved.variables.post.html" class="classname">$_POST['action']</a></var> as <i>P</i> comes
        after <i>G</i> in our example directive value.
       </p>
       <div class="warning"><b class="warning">Warning</b>
        <p class="para">
         In both the CGI and FastCGI SAPIs,
         <var class="varname"><a href="reserved.variables.server.html" class="classname">$_SERVER</a></var> is
         also populated by values from the environment; <i>S</i>
         is always equivelant to <i>ES</i> regardless of the
         placement of <i>E</i> elsewhere in this directive.
        </p>
       </div>
       <blockquote><p><b class="note">Note</b>: 
        
         The content and order of
         <var class="varname"><a href="reserved.variables.request.html" class="classname">$_REQUEST</a></var> is also
         affected by this directive.
        <br />
       </p></blockquote>
      </dd>

     </dt>


     <dt id="ini.request-order">
      <span class="term">
       <i><tt class="parameter">request_order</tt></i>

       <a href="language.types.string.html" class="type string">string</a>
      </span>

      <dd>

       <p class="para">
        This directive describes the order in which PHP registers GET, POST
        and Cookie variables into the _REQUEST array. Registration is done
        from left to right, newer values override older values.
       </p>
       <p class="para">
        If this directive is not set, variables_order is used for
        <var class="varname"><a href="reserved.variables.request.html" class="classname">$_REQUEST</a></var> contents.
       </p>
      </dd>

     </dt>


     <dt id="ini.auto-globals-jit">
      <span class="term">
       <i><tt class="parameter">auto_globals_jit</tt></i>

       <a href="language.types.boolean.html" class="type boolean">boolean</a>
      </span>

      <dd>

       <p class="para">
        When enabled, the SERVER and ENV variables are created when they&#039;re
        first used (Just In Time) instead of when the script starts. If these
        variables are not used within a script, having this directive on will
        result in a performance gain.
       </p>
       <p class="para">
        The PHP directives
        <a href="ini.core.html#ini.register-globals" class="link">register_globals</a>,
        <a href="ini.core.html#ini.register-long-arrays" class="link">register_long_arrays</a>,
        and <a href="ini.core.html#ini.register-argc-argv" class="link">register_argc_argv</a>
        must be disabled for this directive to have any affect. Since PHP
        5.1.3 it is not necessary to have <a href="ini.core.html#ini.register-argc-argv" class="link">register_argc_argv</a> disabled.
       </p>
       <div class="warning"><b class="warning">Warning</b>
        <p class="para">
         Usage of SERVER and ENV variables is checked during the compile time
         so using them through e.g. <a href="language.variables.variable.html" class="link">variable variables</a> will
         not cause their initialization.
        </p>
       </div>
      </dd>

     </dt>


     <dt id="ini.register-globals">
      <span class="term">
       <i><tt class="parameter">register_globals</tt></i>

       <a href="language.types.boolean.html" class="type boolean">boolean</a>
      </span>

      <dd>

       <p class="para">
        Whether or not to register the EGPCS (Environment, GET,
        POST, Cookie, Server) variables as global variables.
       </p>
       <p class="para">
        As of <a href="http://www.php.net/releases/4_2_0.php" class="link external">&raquo; PHP 4.2.0</a>,
        this directive defaults to <em class="emphasis">off</em>.
       </p>
       <p class="para">
        Please read the security chapter on
        <a href="security.globals.html" class="link">Using register_globals</a>
        for related information.
       </p>
       <p class="para">
        Please note that <code class="systemitem systemitem">register_globals</code>

        cannot be set at runtime (<a href="function.ini-set.html" class="function">ini_set()</a>). Although, you can
        use <var class="filename">.htaccess</var> if your host allows it as described
        above. An example <var class="filename">.htaccess</var> entry:
        <strong class="userinput"><code>php_flag register_globals off</code></strong>
.
       </p>
       <blockquote><p><b class="note">Note</b>: 
        
         <code class="systemitem systemitem">register_globals</code>
 is affected
         by the <a href="ini.core.html#ini.variables-order" class="link">variables_order</a>
         directive.
        <br />
       </p></blockquote>
       <div class="warning"><b class="warning">Warning</b><p class="simpara">This feature has been
<em class="emphasis">DEPRECATED</em> and <em class="emphasis">REMOVED</em> as of PHP 6.0.0.
Relying on this feature is highly discouraged.</p></div>
      </dd>