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><H1
><A
NAME="function.get-defined-constants"
></A
>get_defined_constants</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN180849"
></A
><P
>    (PHP 4 &#62;= 4.1.0, PHP 5)</P
>get_defined_constants&nbsp;--&nbsp;Returns an associative array with the names of all the constants and their values</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180852"
></A
><H2
>说明</H2
>array <B
CLASS="methodname"
>get_defined_constants</B
> ( [mixed categorize] )<BR
></BR
><P
>&#13;   Returns the names and values of all the constants currently defined.
   This includes those created by extensions as well as those created with
   the <A
HREF="function.define.html"
><B
CLASS="function"
>define()</B
></A
> function.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180862"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>categorize</CODE
></DT
><DD
><P
>&#13;       May be passed, causing this function to return a multi-dimensional
       array with categories in the keys of the first dimension and constants
       and their values in the second dimension.
       <DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN180871"
></A
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />define</font><font color="#007700">(</font><font color="#DD0000">"MY_CONSTANT"</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">);<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">get_defined_constants</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
><P
>上例的输出类似于：</P
><TABLE
BORDER="0"
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CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Array
(
    [internal] =&#62; Array
        (
            [E_ERROR] =&#62; 1
            [E_WARNING] =&#62; 2
            [E_PARSE] =&#62; 4
            [E_NOTICE] =&#62; 8
            [E_CORE_ERROR] =&#62; 16
            [E_CORE_WARNING] =&#62; 32
            [E_COMPILE_ERROR] =&#62; 64
            [E_COMPILE_WARNING] =&#62; 128
            [E_USER_ERROR] =&#62; 256
            [E_USER_WARNING] =&#62; 512
            [E_USER_NOTICE] =&#62; 1024
            [E_ALL] =&#62; 2047
            [TRUE] =&#62; 1
        )

    [pcre] =&#62; Array
        (
            [PREG_PATTERN_ORDER] =&#62; 1
            [PREG_SET_ORDER] =&#62; 2
            [PREG_OFFSET_CAPTURE] =&#62; 256
            [PREG_SPLIT_NO_EMPTY] =&#62; 1
            [PREG_SPLIT_DELIM_CAPTURE] =&#62; 2
            [PREG_SPLIT_OFFSET_CAPTURE] =&#62; 4
            [PREG_GREP_INVERT] =&#62; 1
        )

    [user] =&#62; Array
        (
            [MY_CONSTANT] =&#62; 1
        )

)</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
      </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
        The value of the <CODE
CLASS="parameter"
>categorize</CODE
> parameter is irrelevant,
        only its presence is considered.
       </P
></BLOCKQUOTE
></DIV
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180878"
></A
><H2
>返回值</H2
><P
>&#13;   
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180881"
></A
><H2
>更新日志</H2
><P
>&#13;   <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN180884"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>版本</TH
><TH
>说明</TH
></TR
></THEAD
><TBODY
><TR
><TD
>5.0.0</TD
><TD
>&#13;        The <CODE
CLASS="parameter"
>categorize</CODE
> parameter was added.
       </TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180895"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN180898"
></A
><P
><B
>例 1. <B
CLASS="function"
>get_defined_constants()</B
> Example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />print_r</font><font color="#007700">(</font><font color="#0000BB">get_defined_constants</font><font color="#007700">());<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>上例的输出类似于：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Array
(
    [E_ERROR] =&#62; 1
    [E_WARNING] =&#62; 2
    [E_PARSE] =&#62; 4
    [E_NOTICE] =&#62; 8
    [E_CORE_ERROR] =&#62; 16
    [E_CORE_WARNING] =&#62; 32
    [E_COMPILE_ERROR] =&#62; 64
    [E_COMPILE_WARNING] =&#62; 128
    [E_USER_ERROR] =&#62; 256
    [E_USER_WARNING] =&#62; 512
    [E_USER_NOTICE] =&#62; 1024
    [E_ALL] =&#62; 2047
    [TRUE] =&#62; 1
)</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN180904"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.defined.html"
><B
CLASS="function"
>defined()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.get-loaded-extensions.html"
><B
CLASS="function"
>get_loaded_extensions()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.get-defined-functions.html"
><B
CLASS="function"
>get_defined_functions()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.get-defined-vars.html"
><B
CLASS="function"
>get_defined_vars()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
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