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GifCreator

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GifCreator is a PHP class to create animated GIF from multiple images

For what ?

This class helps you to create an animated GIF image: give multiple images and their duration and that's it !

Usage

1 - Creation:

// Create an array containing file paths, resource var (initialized with imagecreatefromXXX), 
// image URLs or even binary code from image files.
// All sorted in order to appear.
$frames = array(
    imagecreatefrompng("/../images/pic1.png"), // Resource var
    "/../images/pic2.png", // Image file path
    file_get_contents("/../images/pic3.jpg"), // Binary source code
    'http://thisisafakedomain.com/images/pic4.jpg', // URL
);

// Create an array containing the duration (in millisecond) of each frames (in order too)
$durations = array(40, 80, 40, 20);

// Initialize and create the GIF !
$gc = new GifCreator();
$gc->create($frames, $durations, 5);

The 3rd parameter of create() method allows you to choose the number of loop of your animated gif before it stops. In the previous example, I chose 5 loops. Set 0 (zero) to get an infinite loop.

2 - Get the result:

You can now get the animated GIF binary:

$gifBinary = $gc->getGif();

Then you can show it in the navigator:

header('Content-type: image/gif');
header('Content-Disposition: filename="butterfly.gif"');
echo $gifBinary;
exit;

Or save it in a folder as a GIF:

file_put_contents('/myfolder/animated_picture.gif', $gifBinary);

Behavior

The transparency is based on the first given frame. It will be saved only if you give multiple frames with same transparent background.
The dimensions of the generated GIF are based on the first frame. If you need to resize your frames to get the same dimension, you can use this class: https://github.com/Sybio/ImageWorkshop

About

The class reuses some part of code of "GIFEncoder.class.php" by László Zsidi (thanks to him).

Sybio/GifCreator

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