php生成gif动画

<?php
// 创建一个GIF动画
$image = imagecreate(300, 200);
$bgColor = imagecolorallocate($image, 255, 255, 255);

// 添加帧
for ($i = 0; $i < 10; $i++) {
    $color = imagecolorallocate($image, rand(0, 255), rand(0, 255), rand(0, 255));
    imagefilledrectangle($image, $i * 30, 100 - $i * 10, $i * 30 + 20, 100, $color);
    imagegif($image, 'frame_' . $i . '.gif');
}

// 合成GIF动画
$frames = [];
for ($i = 0; $i < 10; $i++) {
    $frames[] = imagecreatefromgif('frame_' . $i . '.gif');
}

$image = new Imagick();
foreach ($frames as $frame) {
    $image->addImage($frame);
}
$image->setFormat('GIF');
$image->optimizeImageLayers();
$image->writeImages('animation.gif', true);

// 清理
foreach ($frames as $frame) {
    imagedestroy($frame);
}
imagedestroy($image);
?>