<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >gmp_intval</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="GMP Functions" HREF="ref.gmp.html"><LINK REL="PREVIOUS" TITLE="gmp_init" HREF="function.gmp-init.html"><LINK REL="NEXT" TITLE="gmp_invert" HREF="function.gmp-invert.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.gmp-init.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.gmp-invert.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.gmp-intval" ></A >gmp_intval</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN64573" ></A ><P > (PHP 4 >= 4.0.4, PHP 5)</P >gmp_intval -- Convert GMP number to integer</DIV ><DIV CLASS="refsect1" ><A NAME="AEN64576" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >gmp_intval</B > ( resource gmpnumber )<BR ></BR ><P > This function allows to convert GMP number to integer. <DIV CLASS="warning" ><P ></P ><TABLE CLASS="warning" BORDER="1" WIDTH="100%" ><TR ><TD ALIGN="CENTER" ><B >警告</B ></TD ></TR ><TR ><TD ALIGN="LEFT" ><P > This function returns a useful result only if the number actually fits the PHP integer (i.e., signed long type). If you want just to print the GMP number, use <A HREF="function.gmp-strval.html" ><B CLASS="function" >gmp_strval()</B ></A >. </P ></TD ></TR ></TABLE ></DIV > </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN64588" ></A ><P ><B >例 1. <B CLASS="function" >gmp_intval()</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">// displays correct result<br /></font><font color="#007700">echo </font><font color="#0000BB">gmp_intval</font><font color="#007700">(</font><font color="#DD0000">"2147483647"</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// displays wrong result, above PHP integer limit<br /></font><font color="#007700">echo </font><font color="#0000BB">gmp_intval</font><font color="#007700">(</font><font color="#DD0000">"2147483648"</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// displays correct result<br /></font><font color="#007700">echo </font><font color="#0000BB">gmp_strval</font><font color="#007700">(</font><font color="#DD0000">"2147483648"</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > The printout of the above program will be: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >2147483647 2147483647 2147483648</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></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.gmp-init.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.gmp-invert.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >gmp_init</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.gmp.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >gmp_invert</TD ></TR ></TABLE ></DIV ></BODY ></HTML >