php 如何在我的服务器上安装 Pdftk？
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How do I install Pdftk on my server?
提问by zeckdude
I am using a Linux Server and am trying to install Pdftk, but I am problems trying to figure out what exactly to do.
我正在使用 Linux 服务器并且正在尝试安装 Pdftk，但是我在尝试弄清楚究竟要做什么时遇到了问题。
I found the following documentation on how to install it, but they refer mostly to installing it on the local Windows machine.
我找到了以下有关如何安装它的文档，但它们主要是指在本地 Windows 机器上安装它。
They are: http://www.andrewheiss.com/blog/2009/07/29/installing-pdftk-php/
它们是：http: //www.andrewheiss.com/blog/2009/07/29/installing-pdftk-php/
http://www.accesspdf.com/pdftk/#packages
http://www.accesspdf.com/pdftk/#packages
Can someone help me unserstand exactly what files I need to place where on my server so I can refer to pdftk?
有人可以帮我弄明白我需要将哪些文件放在我的服务器上，以便我可以参考 pdftk 吗？
回答by Bot
Pdftk is a version of iText which has been converted from Java to c++ and rebuilt with a command-line bridge for easy access from PHP applications.
Pdftk 是 iText 的一个版本，它已从 Java 转换为 C++，并使用命令行桥重新构建，以便从 PHP 应用程序轻松访问。
To build pdftk on Redhat / CentOS please follow the below instructions.
要在 Redhat / CentOS 上构建 pdftk，请按照以下说明进行操作。
ssh [server to install pdftk on]
Now that we are in the server we need to create the directories to store pdftk.
现在我们在服务器中，我们需要创建目录来存储 pdftk。
cd /
sudo mkdir extra
cd extra
sudo mkdir src
cd src
sudo wget http://www.pdfhacks.com/pdftk/pdftk-1.41.tar.gz
sudo tar zxvf pdftk-1.41.tar.gz
cd pdftk-1.41/pdftk
Now we need to install the gcj libraries.
现在我们需要安装 gcj 库。
sudo yum install java-1.4.2-gcj-compat-devel.i386
The gcc-c++ library doesn't get installed with the gcj package so we will install it now, so we don't get an error halfway through the compile process.
gcc-c++ 库没有随 gcj 包一起安装，所以我们现在就安装它，这样我们就不会在编译过程中途出现错误。
sudo yum install gcc-c++
If you compile the application right now you will receive a warning that tmpnam is dangerous to use and you should use mkstemp.
如果您现在编译应用程序，您将收到一条警告，指出使用 tmpnam 很危险，您应该使用 mkstemp。
sudo vi report.cc
Run this from inside VI to do a search and replace for the tmpnam method.
从 VI 内部运行它以搜索并替换 tmpnam 方法。
:%s/tmpnam(/mkstemp(/g
Press escape and save the changes with
按退出并保存更改
:wq!
Now that we have all the packages installed, we are going to start compiling pdftk-1.41
现在我们已经安装了所有的包，我们将开始编译 pdftk-1.41
from /extra/src/pdftk-1.41/pdftk run the following command
从 /extra/src/pdftk-1.41/pdftk 运行以下命令
sudo make -f Makefile.RedHat
This will kick off the build process for compiling and converting the java file to c++. This could take SEVERAL minutes to convert iText to c++. Go grab yourself a margarita from our new margarita machine in the break room :).
这将启动编译 Java 文件并将其转换为 C++ 的构建过程。这可能需要几分钟才能将 iText 转换为 C++。去休息室用我们的新玛格丽塔机拿一杯玛格丽塔酒:)。
Now with the pdftk file created we will want to copy it to the /bin directory so that we can run it from anywhere.
现在创建 pdftk 文件后，我们要将其复制到 /bin 目录，以便我们可以从任何地方运行它。
sudo cp pdftk /usr/local/bin
Let's make sure the build was successful and run
让我们确保构建成功并运行
pdftk --version
回答by etc-100g
As of 2020, things are different now. CentOS 6 is stepping out and pdftk can only support CentOS 5/6. GCJ on CentOS 7 is removed, so installing from source is not easy too. But we have docker now:
到 2020 年，现在情况有所不同。CentOS 6 即将退出，pdftk 只能支持CentOS 5/6。CentOS 7 上的 GCJ 已被删除，因此从源代码安装也不容易。但是我们现在有了 docker：
FROM centos:centos6
RUN yum install -y https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/pdftk-2.02-1.el6.x86_64.rpm
Then build with docker build . -t pdftkand run as:
然后构建docker build . -t pdftk并运行：
docker run -it --rm -v $PWD:/data --workdir /data pdftk pdftk ./input.pdf output ./output.pdf
The example above can repair a pdf file missing a dozen of KB of data if you are lucky.
如果幸运的话，上面的示例可以修复丢失了十几 KB 数据的 pdf 文件。
