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>memory_get_usage</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN181793"
></A
><P
>    (PHP 4 &#62;= 4.3.2, PHP 5)</P
>memory_get_usage&nbsp;--&nbsp;Returns the amount of memory allocated to PHP</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181796"
></A
><H2
>说明</H2
>int <B
CLASS="methodname"
>memory_get_usage</B
> ( [bool real_usage] )<BR
></BR
><P
>&#13;   Returns the amount of memory, in bytes, that's currently being
   allocated to your PHP script.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181805"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>real_usage</CODE
></DT
><DD
><P
>&#13;       Set this to <TT
CLASS="constant"
><B
>TRUE</B
></TT
> to get the real size of memory allocated from
       system. If not set or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> only the memory used by
       <TT
CLASS="literal"
>emalloc()</TT
> is reported.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181817"
></A
><H2
>返回值</H2
><P
>&#13;   Returns the memory amount in bytes.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181820"
></A
><H2
>更新日志</H2
><P
>&#13;   <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN181823"
></A
><TABLE
BORDER="1"
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><COL><COL><THEAD
><TR
><TH
>版本</TH
><TH
>说明</TH
></TR
></THEAD
><TBODY
><TR
><TD
>5.2.1</TD
><TD
>&#13;        Compiling with <A
HREF="ini.core.html#ini.memory-limit"
>--enable-memory-limit</A
> 
        is no longer required for this function to exist.
       </TD
></TR
><TR
><TD
>5.2.0</TD
><TD
>&#13;        <CODE
CLASS="parameter"
>real_usage</CODE
> was added.
       </TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181838"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN181841"
></A
><P
><B
>例 1. A <B
CLASS="function"
>memory_get_usage()</B
> example</B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// This is only an example, the numbers below will<br />// differ depending on your system<br /><br /></font><font color="#007700">echo </font><font color="#0000BB">memory_get_usage</font><font color="#007700">() . </font><font color="#DD0000">"\n"</font><font color="#007700">; </font><font color="#FF8000">// 36640<br /><br /></font><font color="#0000BB">$a </font><font color="#007700">= </font><font color="#0000BB">str_repeat</font><font color="#007700">(</font><font color="#DD0000">"Hello"</font><font color="#007700">, </font><font color="#0000BB">4242</font><font color="#007700">);<br /><br />echo </font><font color="#0000BB">memory_get_usage</font><font color="#007700">() . </font><font color="#DD0000">"\n"</font><font color="#007700">; </font><font color="#FF8000">// 57960<br /><br /></font><font color="#007700">unset(</font><font color="#0000BB">$a</font><font color="#007700">);<br /><br />echo </font><font color="#0000BB">memory_get_usage</font><font color="#007700">() . </font><font color="#DD0000">"\n"</font><font color="#007700">; </font><font color="#FF8000">// 36744<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></TD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN181845"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TR
><TD
><A
HREF="function.memory-get-peak-usage.html"
><B
CLASS="function"
>memory_get_peak_usage()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="ini.core.html#ini.memory-limit"
>memory_limit</A
></TD
></TR
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></P
>
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