php判断gif图片是否为动画

php判断gif图片是否为动画

php判断gif图片是否为动画,即帧数是否大于1。代码如下:

{ $fp=fopen($filename, 'rb'); $filecontent=fread($fp, filesize($filename));

fclose($fp);

return strpos($filecontent,chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0')===FALSE?0:1; }

echo IsAnimatedGif("zzsky.gif"); ?>