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Example code of sobhanlori/steganography

Informations about the package steganography

PHP Steganography

A lightweight PHP package for hiding and retrieving secret messages inside PNG images using steganography.

Features

Installation

Install the package via Composer:

Requirements

Usage

Hide Data Inside an Image

Download Encoded Image

If you're using the package in a web application, you can directly send the generated image to the browser:

Retrieve Hidden Data

How It Works

The package uses image steganography techniques to embed data within image pixels. The visual appearance of the image remains nearly identical to the original while containing hidden information that can later be extracted.

Limitations

Image Format

Currently, all generated output images are saved as PNG files.

Using PNG ensures that hidden data is preserved because PNG is a lossless image format.

Supported Characters

At the moment, hidden messages can contain:

Unicode and non-English characters are not currently supported.

Examples of supported text:

Example

Contributing

Contributions are welcome.

Running Tests

Before submitting a pull request, please ensure all tests pass successfully.

Security Notes

Steganography hides the existence of data but does not encrypt it.

For sensitive information, consider encrypting your message before embedding it into an image.

License

The MIT License (MIT).

See the LICENSE file for more information.

All versions of steganography with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
ext-gd Version *
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