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

PHAR archives can package multiple resources into a single file. Phar::mapPhar() Method addresses a specific part of that process: registers the current running Phar archive under an alias in its startup stub. The examples distinguish archive-level effects from member-level effects.

What Is Phar::mapPhar() Method?

Registers the current running Phar archive under an alias in its startup stub.

Its syntax is:

Phar::mapPhar(?string $alias = null, int $offset = 0)

The parameters are:

• ?string $alias = null — Virtual archive alias used with phar:// paths.
• int $offset = 0 — Byte offset or position from the chosen origin.

Return value: The declared return type is bool. This is intended for code executing from within a Phar stub.

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: This is intended for code executing from within a Phar stub.

Example 1: Basic Usage

The basic example focuses on the behavior of Phar::mapPhar() Method: registers the current running Phar archive under an alias in its startup stub. Inputs are defined locally or shown as application-controlled paths.

<?php

Phar::mapPhar("application.phar");
// Run from the archive stub before loading bundled files.

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::mapPhar() Method. Notice the different checks, arguments, or output handling.

<?php

// In the stub of the executing application.phar:
Phar::mapPhar();
require "phar://" . __FILE__ . "/bootstrap.php";

This variation matters because this is intended for code executing from within a Phar stub.

Practical Example: Working with Archive Entries

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

<?php

// From the executable archive stub itself:
Phar::mapPhar("cli-program.phar");
require "phar://cli-program.phar/src/main.php";
__HALT_COMPILER();

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: Registers the current running Phar archive under an alias in its startup stub.
• Limitation: This is intended for code executing from within a Phar stub.
• 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::mapPhar() Method for the specific behavior described above. The related operation, Phar::loadPhar(), serves a different purpose; do not substitute it unless that different behavior is intended.

Common Beginner Mistakes

Key Takeaways

• Registers the current running Phar archive under an alias in its startup stub.
• This is intended for code executing from within a Phar stub.
• Related operation: Phar::loadPhar() — Registers an archive, whereas mapPhar() maps the currently executing archive from its stub.

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