How to solve PDF merge problem? It can be done easily using the iio/libmergepdf library!

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When processing PDF files, you often encounter situations where you need to merge multiple PDF files into one file. However, traditional methods often require complex operations and third-party tools, which are inefficient and error-prone. Recently, I encountered this problem in my project, and by using the iio/libmergepdf library, I successfully solved this problem, greatly improving work efficiency.

Using the iio/libmergepdf library is very simple, just install it through Composer:

 <code>composer require iio/libmergepdf</code>

After installation, you can easily merge multiple PDF files. For example, append the first ten pages of bar.pdf to foo.pdf :

 <code class="language-php">use iio\libmergepdf\Merger; use iio\libmergepdf\Pages; $merger = new Merger; $merger->addFile('foo.pdf'); $merger->addFile('bar.pdf', new Pages('1-10')); $createdPdf = $merger->merge();</code>

If you need to add PDF files in batches, you can use the iterator:

 <code class="language-php">use iio\libmergepdf\Merger; $merger = new Merger; $merger->addIterator(['A.pdf', 'B.pdf']); $createdPdf = $merger->merge();</code>

It should be noted that the default FPDI driver cannot handle compressed PDF files in version 1.5 and later. To solve this problem, you can use a more experimental TCPDI driver:

 <code class="language-php">use iio\libmergepdf\Merger; use iio\libmergepdf\Driver\TcpdiDriver; $merger = new Merger(new TcpdiDriver);</code>

If you need an immutable merger, you can use the driver directly:

 <code class="language-php">use iio\libmergepdf\Driver\Fpdi2Driver; use iio\libmergepdf\Source\FileSource; use iio\libmergepdf\Pages; $merger = new Fpdi2Driver; $createdPdf = $merger->merge( new FileSource('foo.pdf'), new FileSource('bar.pdf', new Pages('1-10')) );</code>

Using the iio/libmergepdf library, I not only solved the problem of PDF merge, but also avoided the problem of missing links and other content during the merge process. Although there are some maintenance problems with the TCPDI driver, this does not affect its effectiveness. In general, the iio/libmergepdf library provides an efficient and convenient solution for the merging of PDF files, greatly improving my work efficiency.

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