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Phar::compressFiles is a method in PHP that is used to compress multiple files into a Phar archive.

To use Phar::compressFiles, you need to follow these steps:

1. Create a new Phar object using the Phar constructor. For example:
php
$phar = new Phar('/path/to/archive.phar');


2. Use the Phar::compressFiles method to compress the files. This method takes an array of file paths as input. For example:
php
$files = [
'/path/to/file1.php',
'/path/to/file2.php',
'/path/to/file3.php',
];

$phar->compressFiles(Phar::GZ, $files);


The first argument to Phar::compressFiles is the compression format. In this example, I used Phar::GZ for GZIP compression. Other possible compression formats are Phar::BZ2 for BZIP2 compression and Phar::NONE for no compression.

Note: Before calling Phar::compressFiles, make sure that the Phar extension is enabled in your PHP installation.

3. Once the files are compressed, you can iterate over them like any other Phar archive. For example, you can use a foreach loop to iterate over the compressed files and perform operations on them:
php
foreach ($phar as $file) {
// Do something with $file
}


4. Optionally, you can save the Phar archive to disk using the Phar::compressFiles method. This method takes an optional second argument, the file name of the saved Phar archive. For example:
php
$phar->compressFiles(Phar::GZ, $files, '/path/to/archive.phar.gz');


Note: The compression format specified in Phar::compressFiles must match the file extension in the file name. In the above example, the file name ends with .phar.gz to indicate GZIP compression.

That is a basic overview of how to use Phar::compressFiles in PHP to compress files into a Phar archive. You can refer to the PHP documentation for more details and options.