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

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><DIV
CLASS="reference"
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NAME="ref.info"
></A
><DIV
CLASS="TITLEPAGE"
><H1
CLASS="title"
>CXXIV. PHP Options&#38;Information</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN180201"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="info.intro"
>简介</A
></H1
><P
>&#13;    This functions enable you to get a lot of information about PHP itself,
    e.g. runtime configuration, loaded extensions, version and much more.
    You'll also find functions to set options for your running PHP.
    The probably best known function of PHP - <A
HREF="function.phpinfo.html"
><B
CLASS="function"
>phpinfo()</B
></A
> -
    can be found here.
   </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="info.requirements"
>需求</A
></H1
><P
>要编译本扩展模块无需外部库文件。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="info.installation"
>安装</A
></H1
><P
>本扩展模块作为 PHP 内核的一部分,无需安装即可使用。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="info.configuration"
>运行时配置</A
></H1
><P
>这些函数的行为受 <TT
CLASS="filename"
>php.ini</TT
> 的影响。</P
><P
>&#13;  <DIV
CLASS="table"
><A
NAME="AEN180217"
></A
><P
><B
>表 1. PHP Options/Inf Configuration Options</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Default</TH
><TH
>Changeable</TH
><TH
>Changelog</TH
></TR
></THEAD
><TBODY
><TR
><TD
>assert.active</TD
><TD
>"1"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>assert.bail</TD
><TD
>"0"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>assert.warning</TD
><TD
>"1"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>assert.callback</TD
><TD
>NULL</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>assert.quiet_eval</TD
><TD
>"0"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>enable_dl</TD
><TD
>"1"</TD
><TD
>PHP_INI_SYSTEM</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>max_execution_time</TD
><TD
>"30"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>max_input_time</TD
><TD
>"-1"</TD
><TD
>PHP_INI_PERDIR</TD
><TD
>Available since PHP 4.3.0.</TD
></TR
><TR
><TD
>magic_quotes_gpc</TD
><TD
>"1"</TD
><TD
>PHP_INI_PERDIR</TD
><TD
>PHP_INI_ALL in PHP &#60;= 4.2.3.</TD
></TR
><TR
><TD
>magic_quotes_runtime</TD
><TD
>"0"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
></TBODY
></TABLE
></DIV
>
  有关 PHP_INI_* 常量进一步的细节与定义参见<A
HREF="ini.html"
>附录 H</A
>。
 </P
><P
>以下是配置选项的简要解释。</P
><P
>&#13;  <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><A
NAME="ini.assert.active"
></A
><CODE
CLASS="parameter"
>assert.active</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      Enable <A
HREF="function.assert.html"
><B
CLASS="function"
>assert()</B
></A
> evaluation.
     </P
></DD
><DT
><A
NAME="ini.assert.bail"
></A
><CODE
CLASS="parameter"
>assert.bail</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      Terminate script execution on failed assertions.
     </P
></DD
><DT
><A
NAME="ini.assert.warning"
></A
><CODE
CLASS="parameter"
>assert.warning</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      Issue a PHP warning for each failed assertion.
     </P
></DD
><DT
><A
NAME="ini.assert.callback"
></A
><CODE
CLASS="parameter"
>assert.callback</CODE
>
     <A
HREF="language.types.string.html"
><B
CLASS="type"
>string</B
></A
></DT
><DD
><P
>&#13;      user function to call on failed assertions
     </P
></DD
><DT
><A
NAME="ini.assert.quiet-eval"
></A
><CODE
CLASS="parameter"
>assert.quiet_eval</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      Use the current setting of <A
HREF="function.error-reporting.html"
><B
CLASS="function"
>error_reporting()</B
></A
> during
      assertion expression evaluation. If enabled, no errors are shown
      (implicit error_reporting(0)) while evaluation. If disabled, errors are
      shown according to the settings of <A
HREF="function.error-reporting.html"
><B
CLASS="function"
>error_reporting()</B
></A
>
     </P
></DD
><DT
><A
NAME="ini.enable-dl"
></A
><CODE
CLASS="parameter"
>enable_dl</CODE
>
      <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      This directive is really only useful in the Apache module
      version of PHP. You can turn dynamic loading of
      PHP extensions with <A
HREF="function.dl.html"
><B
CLASS="function"
>dl()</B
></A
> on and
      off per virtual server or per directory.
     </P
><P
>&#13;      The main reason for turning dynamic loading off is
      security. With dynamic loading, it's possible to ignore all
      <A
HREF="features.safe-mode.html#ini.open-basedir"
>open_basedir</A
> restrictions.
      The default is to allow dynamic loading, except when using
      <A
HREF="features.safe-mode.html#ini.safe-mode"
>安全模式</A
>. In <A
HREF="features.safe-mode.html#ini.safe-mode"
>安全模式</A
>, it's 
      always impossible to use <A
HREF="function.dl.html"
><B
CLASS="function"
>dl()</B
></A
>.
     </P
></DD
><DT
><A
NAME="ini.max-execution-time"
></A
><CODE
CLASS="parameter"
>max_execution_time</CODE
>
      <A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
></DT
><DD
><P
>&#13;      This sets the maximum time in seconds a script is allowed to
      run before it is terminated by the parser.  This helps
      prevent poorly written scripts from tying up the server. The
      default setting is <TT
CLASS="literal"
>30</TT
>.  
     </P
><P
>&#13;      The maximum execution time is not affected by system calls,
      stream operations etc.  Please see the
      <A
HREF="function.set-time-limit.html"
><B
CLASS="function"
>set_time_limit()</B
></A
> function for more
      details.
     </P
><P
>&#13;      You can not change this setting with <A
HREF="function.ini-set.html"
><B
CLASS="function"
>ini_set()</B
></A
> when
      running in <A
HREF="features.safe-mode.html#ini.safe-mode"
>安全模式</A
>. The only workaround is to turn off safe mode or
      by changing the time limit in the <TT
CLASS="filename"
>php.ini</TT
>.
     </P
><P
>&#13;      Your web server can have other timeouts. E.g. Apache has
      <TT
CLASS="literal"
>Timeout</TT
> directive, IIS has CGI timeout function, both
      default to 300 seconds. See the web server documentation for meaning of it.
     </P
></DD
><DT
><A
NAME="ini.max-input-time"
></A
><CODE
CLASS="parameter"
>max_input_time</CODE
>
      <A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
></DT
><DD
><P
>&#13;      This sets the maximum time in seconds a script is allowed to
      parse input data, like POST, GET and file uploads.
     </P
></DD
><DT
><A
NAME="ini.magic-quotes-gpc"
></A
><CODE
CLASS="parameter"
>magic_quotes_gpc</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      Sets the magic_quotes state for GPC (Get/Post/Cookie)
      operations.  When magic_quotes are on, all ' (single-quote),
      " (double quote), \ (backslash) and NUL's are escaped
      with a backslash automatically.
     </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
       If the <A
HREF="ref.sybase.html#ini.magic-quotes-sybase"
>&#13;       magic_quotes_sybase</A
> directive is also ON it will
       completely override magic_quotes_gpc.  Having both directives
       enabled means only single quotes are escaped as 
       <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>''</I
></SPAN
>.  Double quotes, backslashes and 
       NUL's will remain untouched and unescaped.
      </P
></BLOCKQUOTE
></DIV
><P
>&#13;      See also <A
HREF="function.get-magic-quotes-gpc.html"
><B
CLASS="function"
>get_magic_quotes_gpc()</B
></A
>
     </P
></DD
><DT
><A
NAME="ini.magic-quotes-runtime"
></A
><CODE
CLASS="parameter"
>magic_quotes_runtime</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      If <CODE
CLASS="parameter"
>magic_quotes_runtime</CODE
> is enabled,
      most functions that return data from any sort of external
      source including databases and text files will have quotes
      escaped with a backslash. If
      <A
HREF="ref.sybase.html#ini.magic-quotes-sybase"
>magic_quotes_sybase</A
>
      is also on, a single-quote is escaped with a single-quote instead
      of a backslash.
     </P
></DD
></DL
></DIV
>
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="info.resources"
>资源类型</A
></H1
><P
>本扩展模块未定义任何资源类型。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="info.constants"
>预定义常量</A
></H1
><P
>以下常量作为 PHP 核心的一部分一直有效。</P
><DIV
CLASS="table"
><A
NAME="AEN180373"
></A
><P
><B
>表 2. Pre-defined <A
HREF="function.phpcredits.html"
><B
CLASS="function"
>phpcredits()</B
></A
> constants</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TH
>Constant</TH
><TH
>Value</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>CREDITS_GROUP</TD
><TD
>1</TD
><TD
>A list of the core developers</TD
></TR
><TR
><TD
>CREDITS_GENERAL</TD
><TD
>2</TD
><TD
>&#13;        General credits: Language design and concept, PHP
        authors and SAPI module.
       </TD
></TR
><TR
><TD
>CREDITS_SAPI</TD
><TD
>4</TD
><TD
>&#13;        A list of the server API modules for PHP, and their authors.
       </TD
></TR
><TR
><TD
>CREDITS_MODULES</TD
><TD
>8</TD
><TD
>&#13;        A list of the extension modules for PHP, and their authors.
       </TD
></TR
><TR
><TD
>CREDITS_DOCS</TD
><TD
>16</TD
><TD
>&#13;        The credits for the documentation team.
       </TD
></TR
><TR
><TD
>CREDITS_FULLPAGE</TD
><TD
>32</TD
><TD
>&#13;        Usually used in combination with the other flags. Indicates
        that a complete stand-alone HTML page needs to be
        printed including the information indicated by the other
        flags.
       </TD
></TR
><TR
><TD
>CREDITS_QA</TD
><TD
>64</TD
><TD
>&#13;        The credits for the quality assurance team.
       </TD
></TR
><TR
><TD
>CREDITS_ALL</TD
><TD
>-1</TD
><TD
>&#13;        All the credits, equivalent to using: CREDITS_DOCS +
        CREDITS_GENERAL + CREDITS_GROUP + CREDITS_MODULES + CREDITS_QA
        CREDITS_FULLPAGE. It generates a complete stand-alone HTML
        page with the appropriate tags. This is the default value.
       </TD
></TR
></TBODY
></TABLE
></DIV
><DIV
CLASS="table"
><A
NAME="AEN180415"
></A
><P
><B
>表 3. <A
HREF="function.phpinfo.html"
><B
CLASS="function"
>phpinfo()</B
></A
> constants</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TH
>Constant</TH
><TH
>Value</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>INFO_GENERAL</TD
><TD
>1</TD
><TD
>&#13;        The configuration line, <TT
CLASS="filename"
>php.ini</TT
> location, build date, Web
        Server, System and more.
       </TD
></TR
><TR
><TD
>INFO_CREDITS</TD
><TD
>2</TD
><TD
>&#13;        PHP Credits.  See also <A
HREF="function.phpcredits.html"
><B
CLASS="function"
>phpcredits()</B
></A
>.
       </TD
></TR
><TR
><TD
>INFO_CONFIGURATION</TD
><TD
>4</TD
><TD
>&#13;        Current Local and Master values for PHP directives. See
        also <A
HREF="function.ini-get.html"
><B
CLASS="function"
>ini_get()</B
></A
>.
       </TD
></TR
><TR
><TD
>INFO_MODULES</TD
><TD
>8</TD
><TD
>&#13;        Loaded modules and their respective settings.
       </TD
></TR
><TR
><TD
>INFO_ENVIRONMENT</TD
><TD
>16</TD
><TD
>&#13;        Environment Variable information that's also available in
        <CODE
CLASS="varname"
>$_ENV</CODE
>.
       </TD
></TR
><TR
><TD
>INFO_VARIABLES</TD
><TD
>32</TD
><TD
>&#13;        Shows all <A
HREF="language.variables.predefined.html"
>&#13;        predefined variables</A
> from EGPCS (Environment, GET,
        POST, Cookie, Server).
       </TD
></TR
><TR
><TD
>INFO_LICENSE</TD
><TD
>64</TD
><TD
>&#13;        PHP License information.  See also the <A
HREF="http://www.php.net/license/"
TARGET="_top"
>license faq</A
>.
       </TD
></TR
><TR
><TD
>INFO_ALL</TD
><TD
>-1</TD
><TD
>&#13;        Shows all of the above. This is the default value.
       </TD
></TR
></TBODY
></TABLE
></DIV
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>ASSERT_ACTIVE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>ASSERT_CALLBACK</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>ASSERT_BAIL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>ASSERT_WARNING</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>ASSERT_QUIET_EVAL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
></DL
></DIV
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>目录</B
></DT
><DT
><A
HREF="function.assert-options.html"
>assert_options</A
>&nbsp;--&nbsp;Set/get the various assert flags</DT
><DT
><A
HREF="function.assert.html"
>assert</A
>&nbsp;--&nbsp;Checks if assertion is <TT
CLASS="constant"
><B
>FALSE</B
></TT
></DT
><DT
><A
HREF="function.dl.html"
>dl</A
>&nbsp;--&nbsp;Loads a PHP extension at runtime</DT
><DT
><A
HREF="function.extension-loaded.html"
>extension_loaded</A
>&nbsp;--&nbsp;Find out whether an extension is loaded</DT
><DT
><A
HREF="function.get-cfg-var.html"
>get_cfg_var</A
>&nbsp;--&nbsp;Gets the value of a PHP configuration option</DT
><DT
><A
HREF="function.get-current-user.html"
>get_current_user</A
>&nbsp;--&nbsp;Gets the name of the owner of the current PHP script</DT
><DT
><A
HREF="function.get-defined-constants.html"
>get_defined_constants</A
>&nbsp;--&nbsp;Returns an associative array with the names of all the constants and their values</DT
><DT
><A
HREF="function.get-extension-funcs.html"
>get_extension_funcs</A
>&nbsp;--&nbsp;Returns an array with the names of the functions of a module</DT
><DT
><A
HREF="function.get-include-path.html"
>get_include_path</A
>&nbsp;--&nbsp;Gets the current include_path configuration option</DT
><DT
><A
HREF="function.get-included-files.html"
>get_included_files</A
>&nbsp;--&nbsp;Returns an array with the names of included or required files</DT
><DT
><A
HREF="function.get-loaded-extensions.html"
>get_loaded_extensions</A
>&nbsp;--&nbsp;Returns an array with the names of all modules compiled and loaded</DT
><DT
><A
HREF="function.get-magic-quotes-gpc.html"
>get_magic_quotes_gpc</A
>&nbsp;--&nbsp;Gets the current configuration setting of magic quotes gpc</DT
><DT
><A
HREF="function.get-magic-quotes-runtime.html"
>get_magic_quotes_runtime</A
>&nbsp;--&nbsp;Gets the current active configuration setting of magic_quotes_runtime</DT
><DT
><A
HREF="function.get-required-files.html"
>get_required_files</A
>&nbsp;--&nbsp;别名 <A
HREF="function.get-included-files.html"
><B
CLASS="function"
>get_included_files()</B
></A
></DT
><DT
><A
HREF="function.getenv.html"
>getenv</A
>&nbsp;--&nbsp;Gets the value of an environment variable</DT
><DT
><A
HREF="function.getlastmod.html"
>getlastmod</A
>&nbsp;--&nbsp;Gets time of last page modification</DT
><DT
><A
HREF="function.getmygid.html"
>getmygid</A
>&nbsp;--&nbsp;Get PHP script owner's GID</DT
><DT
><A
HREF="function.getmyinode.html"
>getmyinode</A
>&nbsp;--&nbsp;Gets the inode of the current script</DT
><DT
><A
HREF="function.getmypid.html"
>getmypid</A
>&nbsp;--&nbsp;Gets PHP's process ID</DT
><DT
><A
HREF="function.getmyuid.html"
>getmyuid</A
>&nbsp;--&nbsp;Gets PHP script owner's UID</DT
><DT
><A
HREF="function.getopt.html"
>getopt</A
>&nbsp;--&nbsp;Gets options from the command line argument list</DT
><DT
><A
HREF="function.getrusage.html"
>getrusage</A
>&nbsp;--&nbsp;Gets the current resource usages</DT
><DT
><A
HREF="function.ini-alter.html"
>ini_alter</A
>&nbsp;--&nbsp;别名 <A
HREF="function.ini-set.html"
><B
CLASS="function"
>ini_set()</B
></A
></DT
><DT
><A
HREF="function.ini-get-all.html"
>ini_get_all</A
>&nbsp;--&nbsp;Gets all configuration options</DT
><DT
><A
HREF="function.ini-get.html"
>ini_get</A
>&nbsp;--&nbsp;Gets the value of a configuration option</DT
><DT
><A
HREF="function.ini-restore.html"
>ini_restore</A
>&nbsp;--&nbsp;Restores the value of a configuration option</DT
><DT
><A
HREF="function.ini-set.html"
>ini_set</A
>&nbsp;--&nbsp;Sets the value of a configuration option</DT
><DT
><A
HREF="function.main.html"
>main</A
>&nbsp;--&nbsp;Dummy for <B
CLASS="function"
>main()</B
></DT
><DT
><A
HREF="function.memory-get-peak-usage.html"
>memory_get_peak_usage</A
>&nbsp;--&nbsp;Returns the peak of memory allocated by PHP</DT
><DT
><A
HREF="function.memory-get-usage.html"
>memory_get_usage</A
>&nbsp;--&nbsp;Returns the amount of memory allocated to PHP</DT
><DT
><A
HREF="function.php-ini-scanned-files.html"
>php_ini_scanned_files</A
>&nbsp;--&nbsp;Return a list of .ini files parsed from the additional ini dir</DT
><DT
><A
HREF="function.php-logo-guid.html"
>php_logo_guid</A
>&nbsp;--&nbsp;Gets the logo guid</DT
><DT
><A
HREF="function.php-sapi-name.html"
>php_sapi_name</A
>&nbsp;--&nbsp;Returns the type of interface between web server and PHP</DT
><DT
><A
HREF="function.php-uname.html"
>php_uname</A
>&nbsp;--&nbsp;Returns information about the operating system PHP is running on</DT
><DT
><A
HREF="function.phpcredits.html"
>phpcredits</A
>&nbsp;--&nbsp;Prints out the credits for PHP</DT
><DT
><A
HREF="function.phpinfo.html"
>phpinfo</A
>&nbsp;--&nbsp;Outputs lots of PHP information</DT
><DT
><A
HREF="function.phpversion.html"
>phpversion</A
>&nbsp;--&nbsp;Gets the current PHP version</DT
><DT
><A
HREF="function.putenv.html"
>putenv</A
>&nbsp;--&nbsp;Sets the value of an environment variable</DT
><DT
><A
HREF="function.restore-include-path.html"
>restore_include_path</A
>&nbsp;--&nbsp;Restores the value of the include_path configuration option</DT
><DT
><A
HREF="function.set-include-path.html"
>set_include_path</A
>&nbsp;--&nbsp;Sets the include_path configuration option</DT
><DT
><A
HREF="function.set-magic-quotes-runtime.html"
>set_magic_quotes_runtime</A
>&nbsp;--&nbsp;Sets the current active configuration setting of magic_quotes_runtime</DT
><DT
><A
HREF="function.set-time-limit.html"
>set_time_limit</A
>&nbsp;--&nbsp;Limits the maximum execution time</DT
><DT
><A
HREF="function.sys-get-temp-dir.html"
>sys_get_temp_dir</A
>&nbsp;--&nbsp;Returns directory path used for temporary files</DT
><DT
><A
HREF="function.version-compare.html"
>version_compare</A
>&nbsp;--&nbsp;Compares two "PHP-standardized" version number strings</DT
><DT
><A
HREF="function.zend-logo-guid.html"
>zend_logo_guid</A
>&nbsp;--&nbsp;Gets the Zend guid</DT
><DT
><A
HREF="function.zend-version.html"
>zend_version</A
>&nbsp;--&nbsp;Gets the version of the current Zend engine</DT
></DL
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