PHP - Create simple animated GIF from two JPEG images?

Does anyone know if it's possible to generate an animated GIF from two different JPEG files, displaying one image for x seconds then the other, and so on..?

Any advice appreciated.

Thanks.

It's not possible using the standard GD functions that come pre-packed with PHP.

There is a class on phpclasses.org for this. I have never used it myself, but it's used by a lot of other packages.

Alternatively, if you have access to ImageMagick from PHP, using either the MagickWand library or the command line, use it. With ImageMagick, it's no problem.

ImageMagick v6 Animation basics (from the IM manual)
Creating an Animated GIF image

Sz.

For a nice, quick and more recent solution, see this SO answer.

For an even more recent solution, here is my fork of it, with a number of small fixes & improvements. An example of it from an actual application:

$anim = new GifCreator\AnimGif();

$gif = $anim->create($image_files);
//file_put_contents("test.gif", $gif);

header("Content-type: image/gif");
echo $gif;

(Requires PHP5.3 with GD2.)

Example that works with PHP 5.6 and GD 2.4.11:

require_once "AnimGif.php";

/*
 * 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.
 */
$image_files = array(
    //imagecreatefrompng("/../images/pic1.png"), // Resource var
    //"/../images/pic2.png", // Image file path
    //file_get_contents("/../images/pic3.jpg"), // Binary source code
    'https://yt3.ggpht.com/-KxeE9Hu93eE/AAAAAAAAAAI/AAAAAAAAAAA/D-DB1Umuimk/s100-c-k-no-mo-rj-c0xffffff/photo.jpg', // URL
    'https://media.licdn.com/mpr/mpr/shrinknp_100_100/AAEAAQAAAAAAAAloAAAAJDRkZGY2MWZmLTM1NDYtNDBhOS04MjYwLWNkM2UzYjdiZGZmMA.png', // URL
    'http://is5.mzstatic.com/image/thumb/Purple128/v4/e4/63/e7/e463e779-e6d0-0c3d-3ec1-97fdbaae230a/source/100x100bb.jpg' // URL
);

/*
 * Create an array containing the duration (in millisecond) of each frame.
 */
$durations_millis = array(
    1000,
    2000,
    3000
);

/*
 * Fix durations.
 */
$durations = array();
for ($i = 0; $i < count($durations_millis); $i++) {
    $durations[$i] = $durations_millis[$i] / 10;
}

/*
 * Specify number of loops. (0 = infinite looping.)
 */
$num_loops = 0;

/*
 * Create gif object.
 */
$anim_gif = new GifCreator\AnimGif();
$gif_object = $anim_gif->create($image_files, $durations, $num_loops);

/*
 * Get the animated GIF binary.
 */
$gif_binary = $gif_object->get();

/*
 * Set the file name of the saved/returned animated GIF.
 */
$file_name = "animated.gif";

/*
 *  Optionally, save animated GIF in a folder as a GIF:
 */
//file_put_contents($file_name, $gif_binary);

/*
 * Optionally, return the animated GIF to client.
 */
header("Content-type: image/gif");
header('Content-Disposition: filename="' . $file_name . '"'); // Optional
echo $gif_binary;

/*
 * All done.
 */
exit;

This cannot be done with GD but I found a great library for it. It is a bit complicated though, so here is a link to the library which makes animated gifs with php. It explains how to use it thoroughly. http://www.phpclasses.org/package/3163-PHP-Generate-GIF-animations-from-a-set-of-GIF-images.html

Select 2 pictures and write 100 for speed 900 for width and height. It will put them in an animated gif slideshow.

Here is the code for that script:

<?php
if(isset($_POST['speed']))
{
    header('Content-type: image/gif');
    if(isset($_POST['download'])){
    header('Content-Disposition: attachment; filename="animated.gif"');
    }
    include('GIFEncoder.class.php');
    function frame($image){
        ob_start();
        imagegif($image);
        global $frames, $framed;
        $frames[]=ob_get_contents();
        $framed[]=$_POST['speed'];
        ob_end_clean();
    }
    foreach ($_FILES["images"]["error"] as $key => $error)
    {
        if ($error == UPLOAD_ERR_OK)
        {
            $tmp_name = $_FILES["images"]["tmp_name"][$key];
            $im = imagecreatefromstring(file_get_contents($tmp_name));
            $resized = imagecreatetruecolor($_POST['width'],$_POST['height']);
            imagecopyresized($resized, $im, 0, 0, 0, 0, $_POST['width'], $_POST['height'], imagesx($im), imagesy($im));
            frame($resized);
        }
    }
    $gif = new GIFEncoder($frames,$framed,0,2,0,0,0,'bin');
    echo $gif->GetAnimation();
}
?>
<form action="" method="post" enctype="multipart/form-data">
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script src="jquery.MultiFile.js"></script>
<script src="jquery.placeholder.js"></script>
<input type="file" name="images[]" class="multi" />
<script>
    $(function(){
        $('input[placeholder], textarea[placeholder]').placeholder();
   });
</script>
   <SCRIPT language=Javascript>
      <!--
      function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }
      //-->
   </SCRIPT>
<input name="speed" maxlength="10" type="text" placeholder="Speed of frames in ms" onkeypress="return isNumberKey(event)">
<input name="width" maxlength="4" type="text" placeholder="Width" onkeypress="return isNumberKey(event)">
<input name="height" maxlength="4" type="text" placeholder="Height" onkeypress="return isNumberKey(event)">
<input type="submit" name="download" value="Download!">
<input type="submit" name="preview" value="Preview!">
</form>

As you see it references the GIFEncoder class found on the first link. It also uses some javascript validation and jQuery multiupload.

Note: this question has already been asked.

来源：https://stackoverflow.com/questions/2191367/php-create-simple-animated-gif-from-two-jpeg-images

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