PHP PngChunk Class

Get, add or remove chunks to PNG. This class is more a personal helper for other projects but could be nice for others too. Feel free to extend the code with new features.

Installation

With composer

composer require pixelcrab/png-chunks

With source

Download the source code from releases or the file PngChunks.php directly from the repository. Include the file in your project and start using it.

Usage

<?php
// Use namespace
use PHPPNG\PNGChunks\PNGChunks;

// Initialize class. Param is a valid PNG file.
$png = new PngChunk(__DIR__ . '/image.png');

// Fetch all tEXt chunks
$chunks = $png->getChunks('tEXt');

// Remove all tEXt chunks
$png->removeChunks('tEXt');

// Add new tEXt chunk
$png->addChunk('tEXt', 'custom', 'my value');

// Some methods are chainable
$png
  ->removeChunks('tEXt')
  ->addChunk('tEXt', 'custom', 'my value');

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