<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Fileinfo Functions</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="函数参考" HREF="funcref.html"><LINK REL="PREVIOUS" TITLE="fdf_set_version" HREF="function.fdf-set-version.html"><LINK REL="NEXT" TITLE="finfo_buffer" HREF="function.finfo-buffer.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="reference" 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.fdf-set-version.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.finfo-buffer.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="reference" ><A NAME="ref.fileinfo" ></A ><DIV CLASS="TITLEPAGE" ><H1 CLASS="title" >XXXVIII. Fileinfo Functions</H1 ><DIV CLASS="PARTINTRO" ><A NAME="AEN51209" ></A ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="fileinfo.intro" >简介</A ></H1 ><P > The functions in this module try to guess the content type and encoding of a file by looking for certain <SPAN CLASS="emphasis" ><I CLASS="emphasis" >magic</I ></SPAN > byte sequences at specific positions within the file. While this is not a bullet proof approach the heuristics used do a very good job. </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="fileinfo.requirements" >需求</A ></H1 ><P > <TT CLASS="literal" >magic_open</TT > library is needed to build this extension. </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="fileinfo.installation" >安装</A ></H1 ><P > 安装此 PECL 扩展库的信息可在手册中标题为 <A HREF="install.pecl.html" >PECL 扩展库安装</A >的一章中找到。 更多信息如新版本,下载,源文件,维护者信息以及更新日志等可以在这里找到: <A HREF="http://pecl.php.netfileinfo" TARGET="_top" >http://pecl.php.netfileinfo</A > </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="fileinfo.configuration" >运行时配置</A ></H1 ><P >本扩展模块在 <TT CLASS="filename" >php.ini</TT > 中未定义任何配置选项。</P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="fileinfo.resources" >资源类型</A ></H1 ><P > There is one resource used in Fileinfo extension: a magic database descriptor returned by <A HREF="function.finfo-open.html" ><B CLASS="function" >finfo_open()</B ></A >. </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="fileinfo.constants" >预定义常量</A ></H1 ><P >以下常量由本扩展模块定义,因此只有在本扩展模块被编译到 PHP 中,或者在运行时被动态加载后才有效。</P ><P ></P ><DIV CLASS="variablelist" ><DL ><DT ><TT CLASS="constant" ><B >FILEINFO_NONE</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > No special handling. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_SYMLINK</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > Follow symlinks. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_MIME</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > Return a mime string, instead of a textual description. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_COMPRESS</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > Decompress compressed files. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_DEVICES</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > Look at the contents of blocks or character special devices. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_CONTINUE</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > Return all matches, not just the first. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_PRESERVE_ATIME</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > If possible preserve the original access time. </P ></DD ><DT ><TT CLASS="constant" ><B >FILEINFO_RAW</B ></TT > (<A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >)</DT ><DD ><P > Don't translate unprintable characters to a <TT CLASS="literal" >\ooo</TT > octal representation. </P ></DD ></DL ></DIV ></DIV ></DIV ><DIV CLASS="TOC" ><DL ><DT ><B >目录</B ></DT ><DT ><A HREF="function.finfo-buffer.html" >finfo_buffer</A > -- Return information about a string buffer</DT ><DT ><A HREF="function.finfo-close.html" >finfo_close</A > -- Close fileinfo resource</DT ><DT ><A HREF="function.finfo-file.html" >finfo_file</A > -- Return information about a file</DT ><DT ><A HREF="function.finfo-open.html" >finfo_open</A > -- Create a new fileinfo resource</DT ><DT ><A HREF="function.finfo-set-flags.html" >finfo_set_flags</A > -- Set libmagic configuration options</DT ></DL ></DIV ></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.fdf-set-version.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.finfo-buffer.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >fdf_set_version</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="funcref.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >finfo_buffer</TD ></TR ></TABLE ></DIV ></BODY ></HTML >