PHP PharData::addFile() Method: Usage and Examples

When working with PharData in PHP, it helps to understand exactly what addFile() does and when the result is useful. This guide uses small examples followed by a practical pattern.

What Is addFile() in PHP?

Copies a file from the filesystem into the archive, optionally giving it a different internal filename.

Syntax:

addFile(string $filename, ?string $localName = ...)

Parameters:

• $filename (string) is required.
• $localName (?string) is optional.

Return value: PHP declares a result determined by the operation for this API in PHP 8.4 where available. For operations that can fail, check errors or exceptions instead of assuming success.

Example 1: Basic Usage

The first example focuses on the operation itself without unrelated application logic.

<?php
$archivePath = sys_get_temp_dir() . "/sample-" . bin2hex(random_bytes(4)) . ".tar";
$archive = new PharData($archivePath);
$archive->addFromString("readme.txt", "Example content");
$sourceDirectory = __DIR__ . '/example-files';
$sourcePath = __DIR__ . '/example-files/report.txt';

$archive->addFile($sourcePath, 'docs/report.txt');

Copies a file from the filesystem into the archive, optionally giving it a different internal filename. The examples distinguish data archives from executable Phar packages. For a TAR/ZIP file, verify the format before using compression, signature, or stub features.

Example 2: Handling Conditions and Failures

Production code must handle cases where the archive, file, runtime feature, or source path is not available. The following example demonstrates an additional usage pattern.

<?php
$archivePath = sys_get_temp_dir() . "/sample-" . bin2hex(random_bytes(4)) . ".tar";
$archive = new PharData($archivePath);
$archive->addFromString("readme.txt", "Example content");
$sourceDirectory = __DIR__ . '/example-files';
$sourcePath = __DIR__ . '/example-files/report.txt';

try {
    $archive->addFile($sourcePath, 'docs/report.txt');
} catch (Throwable $exception) {
    error_log($exception->getMessage());
}

Only catch errors you can handle meaningfully. A PHP warning, a false return value, and an exception are not interchangeable; consult the behavior explained above.

Practical Example: Integrating the Operation

This practical variation shows how to place the operation in a larger file or inspection workflow. The paths and names are illustrative rather than server deployment instructions.

<?php
$archivePath = sys_get_temp_dir() . "/sample-" . bin2hex(random_bytes(4)) . ".tar";
$archive = new PharData($archivePath);
$archive->addFromString("readme.txt", "Example content");
$sourceDirectory = __DIR__ . '/example-files';
$sourcePath = __DIR__ . '/example-files/report.txt';

// Work with a known internal path, not unchecked user input.
$archive->addFile($sourcePath, 'docs/report.txt');

if ($archive->offsetExists("readme.txt")) {
    echo $archive["readme.txt"]->getFilename();
}

Do not copy sample paths blindly into production. Validate allowed paths and confirm the appropriate extension and filesystem permissions first.

Important Behavior and Edge Cases

• PharData works with TAR/ZIP data archives and does not make them executable PHP applications.
• The format and installed zlib/bz2 extensions determine which compression operations are possible.
• Check file paths and archive contents before extracting or publishing files.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Copies a file from the filesystem into the archive, optionally giving it a different internal filename.
• PharData works with TAR/ZIP data archives and does not make them executable PHP applications.
• The format and installed zlib/bz2 extensions determine which compression operations are possible.

PharData::addFile() is useful when its specific purpose matches your application. Keep the examples focused, respect the restrictions above, and validate real-world inputs rather than relying on the example values.