PHP读取PDF内容配合Xpdf的使用

时间:2022-08-22 22:14:01

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