<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >memory_get_usage</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="PHP Options&Information" HREF="ref.info.html"><LINK REL="PREVIOUS" TITLE="memory_get_peak_usage" HREF="function.memory-get-peak-usage.html"><LINK REL="NEXT" TITLE="php_ini_scanned_files" HREF="function.php-ini-scanned-files.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.memory-get-peak-usage.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.php-ini-scanned-files.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.memory-get-usage" ></A >memory_get_usage</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN181793" ></A ><P > (PHP 4 >= 4.3.2, PHP 5)</P >memory_get_usage -- 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 > 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 > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >real_usage</CODE ></DT ><DD ><P > 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 > Returns the memory amount in bytes. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN181820" ></A ><H2 >更新日志</H2 ><P > <DIV CLASS="informaltable" ><P ></P ><A NAME="AEN181823" ></A ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><THEAD ><TR ><TH >版本</TH ><TH >说明</TH ></TR ></THEAD ><TBODY ><TR ><TD >5.2.1</TD ><TD > 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 > <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 > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><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 BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?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">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN181845" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><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 ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.memory-get-peak-usage.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.php-ini-scanned-files.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >memory_get_peak_usage</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.info.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >php_ini_scanned_files</TD ></TR ></TABLE ></DIV ></BODY ></HTML >