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PharData::convertToData() is a method in PHP that is used to convert a Phar archive to a string representation. This method is typically used when you want to manipulate the contents of a Phar archive in memory before saving it to disk or transmitting it over a network.

Here is an example that demonstrates the usage of PharData::convertToData():

php
<?php

// Create a new PharData archive object
$pharData = new PharData('archive.tar');

// Add files to the archive
$pharData->addFile('file1.txt');
$pharData->addFile('file2.txt');

// Convert the Phar archive to a string representation
$data = $pharData->convertToData();

// Output the converted data
echo $data;

?>


In the example above, we create a new PharData archive object and add two files to it. Then, we use the convertToData() method to convert the archive to a string representation, which is stored in the $data variable. Finally, we output the converted data using echo.

Note that the converted data can be used for various purposes, such as saving it to a file or sending it over a network. Also, Phar archives can be compressed using different compression algorithms, so the resulting data may be compressed depending on how the Phar archive was created.

I hope this explanation helps! Let me know if you have any further questions.