有没有一种方法可以检查GIF图像是否具有PHP或Java动画? [英] Is there a way to check if a GIF image has animation with PHP or Java?

问题描述

您知道GIF文件支持动画，但是GIF图像不一定必须在其上具有动画.

You know that GIF files support animation, but a GIF image not necesarily must have an animation on it.

是否可以使用php或java检查GIF图像是否具有动画?

Is there a way to check if a GIF image has an animation using php or java?

谢谢.

推荐答案

下面是一个小的PHP脚本，它可以确定图像是否为动画gif.我已经对其进行了测试，并且对我有用.

Here is a little PHP script that should be able to determine if an image is an animated gif or not. I have tested it and it works for me.

<?php
$img="your_image";
$file = file_get_contents($img);
$animated=preg_match('#(\x00\x21\xF9\x04.{4}\x00\x2C.*){2,}#s', $file);
if ($animated==1){
    echo "This image is an animated gif";
} else {
    echo "This image is not an animated gif";
}
?>

只需将$ img变量编辑为要测试的任何图像(例如image.gif，image.jpg).

Simply edit the $img variable to whatever image you want to test (e.g. image.gif, image.jpg).

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