PHP reads PDF content (Configuration and use of XPDF under LINUX)_PHP tutorial

1. Download

​ ​ ​ First, let’s download the information first.
If you don’t need to convert to Chinese, you only need to download it: xpdf-bin-linux-3.03.tar. If you need to convert to Chinese, you still need it: xpdf-chinese-simplified.tar

2. Installation

Now that the download is complete, we can install it.

[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/ (The downloaded file is placed in the /lcf/xpdf directory)
[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

 

If you don’t need to read Chinese, you can end it here. If you do, let’s continue

[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/

         

​​ ​Copy the contents of the file add-to-xpdfrc in chinese-simplified to the /usr/local/etc/xpdfrc file. Remember that the path inside must be correct. (Note that the Simplified Chinese package here includes the following three formats: ISO-2022-CN, EUC-CN, GBK. Please see clearly, UTF-8 is not supported. You can convert to GBK first and then escape)

3. Function implementation

At this point, all configurations are complete and we are going to start using it.

If it is a simple PDF reading, then just use the following statement.

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

If you need to convert to Chinese, add parameters like this.

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

Of course, adding parameters will still not affect the English conversion, so feel free to use it. It should be noted that what is transferred here is GBK encoded. Many websites now use UTF-8. If you want to avoid displaying garbled characters, you need to escape it again.

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

At this point, you’re done. How do you want to use the read content, and then write code to process it.

Finally, I will add the parameter description of pdftotext for everyone.

The main parameters are as follows:

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

 and 

and prepends the
meta headers.

-enc encoding-name

 

http://www.bkjia.com/PHPjc/477900.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/477900.htmlTechArticle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...