PHP Phar::delMetadata() Method: Usage and Examples

PHAR archives can package multiple resources into a single file. Phar::delMetadata() Method addresses a specific part of that process: deletes archive-level metadata. The examples distinguish archive-level effects from member-level effects.

What Is Phar::delMetadata() Method?

Deletes archive-level metadata.

Its syntax is:

Phar::delMetadata()

This function or method takes no parameters.

Return value: The declared return type is true. Metadata deletion does not delete archive files or their contents.

Requirements: The Phar extension must be enabled. Creating or modifying executable PHAR archives generally requires the phar.readonly setting to be disabled before startup; do not change server configuration just to view this guide.

Important: Metadata deletion does not delete archive files or their contents.

Example 1: Basic Usage

The basic example focuses on the behavior of Phar::delMetadata() Method: deletes archive-level metadata. Inputs are defined locally or shown as application-controlled paths.

<?php

$archivePath = sys_get_temp_dir() . "/example-package.phar";
$archive = new Phar($archivePath);
$archive->setMetadata(["release" => "v2"]);
$archive->delMetadata();
var_dump($archive->hasMetadata());

The displayed value, file content or return status depends on the input and surrounding environment. Results involving local paths, identifiers or generated files are not fixed values.

Example 2: A Different Use Case

This second example illustrates another input or execution condition for Phar::delMetadata() Method. Notice the different checks, arguments, or output handling.

<?php

$archive = new Phar(sys_get_temp_dir() . "/metadata.phar");
if ($archive->hasMetadata()) { $archive->delMetadata(); }

This variation matters because metadata deletion does not delete archive files or their contents.

Practical Example: Working with Archive Entries

The following example demonstrates how Phar::delMetadata() Method fits into a more complete file or archive workflow, including inputs and appropriate checks.

<?php

$archive = new Phar(sys_get_temp_dir() . "/clean-metadata.phar");
if ($archive->hasMetadata()) {
    $archive->delMetadata();
    if ($archive->hasMetadata()) { throw new RuntimeException("Metadata still exists"); }
}

The operation shown is an illustrative script. Adapt the filenames, required permissions, and error handling to your own controlled application environment before running it.

Important Behavior and Edge Cases

• Function behavior: Deletes archive-level metadata.
• Limitation: Metadata deletion does not delete archive files or their contents.
• Availability: The Phar extension must be enabled. Creating or modifying executable PHAR archives generally requires the phar.readonly setting to be disabled before startup; do not change server configuration just to view this guide.

Comparison With Related Functions

Use Phar::delMetadata() Method for the specific behavior described above. The related operation, Phar::setMetadata(), serves a different purpose; do not substitute it unless that different behavior is intended.

Common Beginner Mistakes

Key Takeaways

• Deletes archive-level metadata.
• Metadata deletion does not delete archive files or their contents.
• Related operation: Phar::setMetadata() — Writes archive-level metadata; delMetadata() deletes it.

Phar::delMetadata() Method is useful when its specific behavior matches your application requirement. Keep paths controlled, check failures, and handle environment-dependent operations deliberately.