<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >gmp_init</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_hamdist" HREF="function.gmp-hamdist.html"><LINK REL="NEXT" TITLE="gmp_intval" HREF="function.gmp-intval.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-hamdist.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-intval.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.gmp-init" ></A >gmp_init</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN64544" ></A ><P > (PHP 4 >= 4.0.4, PHP 5)</P >gmp_init -- Create GMP number</DIV ><DIV CLASS="refsect1" ><A NAME="AEN64547" ></A ><H2 >Description</H2 >resource <B CLASS="methodname" >gmp_init</B > ( mixed number [, int base] )<BR ></BR ><P > Creates a GMP number from an integer or string. String representation can be decimal, hexadecimal or octal. Optional parameter <CODE CLASS="parameter" >base</CODE > is available since PHP 4.1.0. Its default value is <TT CLASS="literal" >0</TT >. </P ><P > The base may vary from 2 to 36. If base is 0 (default value), the actual base is determined from the leading characters: if the first two characters are <TT CLASS="literal" >0x</TT > or <TT CLASS="literal" >0X</TT >, hexadecimal is assumed, otherwise if the first character is "0", octal is assumed, otherwise decimal is assumed. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN64565" ></A ><P ><B >例 1. Creating GMP number</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$a </font><font color="#007700">= </font><font color="#0000BB">gmp_init</font><font color="#007700">(</font><font color="#0000BB">123456</font><font color="#007700">);<br /></font><font color="#0000BB">$b </font><font color="#007700">= </font><font color="#0000BB">gmp_init</font><font color="#007700">(</font><font color="#DD0000">"0xFFFFDEBACDFEDF7200"</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > It is not necessary to call this function if you want to use integer or string in place of GMP number in GMP functions, like <A HREF="function.gmp-add.html" ><B CLASS="function" >gmp_add()</B ></A >. Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules as <B CLASS="function" >gmp_init()</B >. </P ></BLOCKQUOTE ></DIV ></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-hamdist.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-intval.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >gmp_hamdist</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_intval</TD ></TR ></TABLE ></DIV ></BODY ></HTML >