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PHP读取PDF内容(LINUX下XPDF的配置和使用)

  一.下载


        首先,我们先把资料下下来先。 
        如果不需要转中文的话,只需要下载它就可以:xpdf-bin-linux-3.03.tar,如果需要转中文,那你就还需要它了:xpdf-chinese-simplified.tar

       二.安装


       现在,下载完毕了吧,我们可以进行安装了。

       [root@localhost ~]# mkdir -p /lcf/upan
       [root@localhost ~]# mkdir -p /lcf/cdrom
       [root@localhost ~]# mkdir -p /lcf/xpdf
      
       [root@localhost ~]# cd /lcf/upan/

       [root@localhost upan]# cp xpdf/* ../xpdf/ (下载的文件放入/lcf/xpdf目录)
       [root@localhost upan]# cd ../xpdf/

       [root@localhost xpdf]# tar -zxvf xpdfbin-linux-3.03.tar.gz

       [root@localhost xpdf]# cd xpdfbin-linux-3.03

       [root@localhost xpdfbin-linux-3.03]# cat INSTALL

       [root@localhost xpdfbin-linux-3.03]# cd bin32/
       [root@localhost bin32]# cp ./* /usr/local/bin/

       [root@localhost bin32]# cd ../doc/


       [root@localhost doc]# mkdir -p /usr/local/man/man1
       [root@localhost doc]# mkdir -p /usr/local/man/man5
       [root@localhost doc]# cp *.1 /usr/local/man/man1
       [root@localhost doc]# cp *.5 /usr/local/man/man5

      


       如果不需要读取中文的话,到这里就可以结束了,如果需要,那我们继续往后

 

       [root@localhost doc]# cp sample-xpdfrc /usr/local/etc/xpdfrc

       [root@localhost xpdf]# cd /lcf/xpdf


       [root@localhost xpdf]# tar -zxvf xpdf-chinese-simplified.tar.gz
       [root@localhost xpdf]# cd xpdf-chinese-simplified
       [root@localhost xpdf]# mkdir -p/usr/local/share/xpdf/chinese-simplified
       [root@localhost xpdf]# cd xpdf-chinese-simplified/

       [root@localhost xpdf-chinese-simplified]# cp Adobe-GB1.cidToUnicode ISO-2022-CN.unicodeMap EUC-CN.unicodeMap GBK.unicodeMap CMAP /usr/local/share/xpdf/chinese-simplified/


      


        把chinese-simplified里面文件add-to-xpdfrc 的内容复制到/usr/local/etc/xpdfrc文件中。记得里面的路径要正确。(注意,这里面的简体中文包包括以下三种格式:ISO-2022-CN,EUC-CN,GBK ,看清楚哦,不支持UTF-8,可以先转为GBK,然后进行转义)

 

       三.功能实现

      至此,所有的配置完毕,我们要开始使用它了。

      如果是简单的PDF读取,那么直接用下面的语句就OK了。

       $content = shell_exec('/usr/local/bin/pdftotext '.$filename.' -');
  


   如果需要转中文,如此这般,加上参数。

   $content = shell_exec('/usr/local/bin/pdftotext -layout -enc GBK '.$filename.' -');

   当然,加了参数之后依然是不影响英文的转换的,所以,放心使用吧。需要注意的是,这里转出来的是GBK编码的哦,现在网站很多用的是UTF-8,想要不显示乱码的话,需要再次转义一下哦。

   $content = mb_convert_encoding($content, 'UTF-8','GBK');

   至此,就大功告成了。读取出来的内容,你想如何使用,再写代码处理吧。

 


   最后加一下pdftotext 的参数说明给大家。


   主要参数如下:

OPTIONS
Many of the following options can be set with configuration file com-
mands. These are listed in square brackets with the description of the
corresponding command line option.

-f number
Specifies the first page to convert.

-l number
Specifies the last page to convert.

-layout
Maintain (as best as possible) the original physical layout of
the text. The default is to 'undo' physical layout (columns,
hyphenation, etc.) and output the text in reading order.

-fixed number
Assume fixed-pitch (or tabular) text, with the specified charac-
ter width (in points). This forces physical layout mode.

-raw Keep the text in content stream order. This is a hack which
often "undoes" column formatting, etc. Use of raw mode is no
longer recommended.

-htmlmeta
Generate a simple HTML file, including the meta information.
This simply wraps the text in <pre> and </pre> and prepends the
meta headers.

-enc encoding-name


 

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