<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >bzcompress</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="Bzip2 压缩函数" HREF="ref.bzip2.html"><LINK REL="PREVIOUS" TITLE="bzclose" HREF="function.bzclose.html"><LINK REL="NEXT" TITLE="bzdecompress" HREF="function.bzdecompress.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.bzclose.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.bzdecompress.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.bzcompress" ></A >bzcompress</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN15342" ></A ><P > (PHP 4 >= 4.3.3, PHP 5)</P >bzcompress -- Compress a string into bzip2 encoded data</DIV ><DIV CLASS="refsect1" ><A NAME="AEN15345" ></A ><H2 >说明</H2 >mixed <B CLASS="methodname" >bzcompress</B > ( string source [, int blocksize [, int workfactor]] )<BR ></BR ><P > <B CLASS="function" >bzcompress()</B > compresses the given string and returns it as bzip2 encoded data. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN15361" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >source</CODE ></DT ><DD ><P > The string to compress. </P ></DD ><DT ><CODE CLASS="parameter" >blocksize</CODE ></DT ><DD ><P > Specifies the blocksize used during compression and should be a number from 1 to 9 with 9 giving the best compression, but using more resources to do so. <CODE CLASS="parameter" >blocksize</CODE > defaults to 4. </P ></DD ><DT ><CODE CLASS="parameter" >workfactor</CODE ></DT ><DD ><P > Controls how the compression phase behaves when presented with worst case, highly repetitive, input data. The value can be between 0 and 250 with 0 being a special case and 30 being the default value. </P ><P > Regardless of the <CODE CLASS="parameter" >workfactor</CODE >, the generated output is the same. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN15383" ></A ><H2 >返回值</H2 ><P > The compressed string or number of error in case of error. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN15386" ></A ><H2 >范例</H2 ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN15388" ></A ><P ><B >例 1. Compressing data</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$str </font><font color="#007700">= </font><font color="#DD0000">"sample data"</font><font color="#007700">;<br /></font><font color="#0000BB">$bzstr </font><font color="#007700">= </font><font color="#0000BB">bzcompress</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">, </font><font color="#0000BB">9</font><font color="#007700">);<br />echo </font><font color="#0000BB">$bzstr</font><font color="#007700">;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN15391" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.bzdecompress.html" ><B CLASS="function" >bzdecompress()</B ></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.bzclose.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.bzdecompress.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >bzclose</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.bzip2.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >bzdecompress</TD ></TR ></TABLE ></DIV ></BODY ></HTML >