/** * desription 压缩图片 * @param sting $imgsrc 图片路径 * @param string $imgdst 压缩后保存路径 */function image_png_size_add($imgsrc,$imgdst){ ???list($width,$height,$type) = getimagesize($imgsrc); ?????$new_width = "64"; ?????$new_height = "64"; ???switch($type){ ???????case 1: ???????????$giftype=check_gifcartoon($imgsrc); ?????????????if($giftype){ ???????????????header(‘Content-Type:image/gif‘); ?????????????????$image_wp=imagecreatetruecolor($new_width, $new_height); ?????????????????$image = imagecreatefromgif($imgsrc); ?????????????????imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); ?????????????????imagejpeg($image_wp, $imgdst,75); ?????????????????imagedestroy($image_wp); ?????????????} ?????????????break; ?????????case 2: ???????????header(‘Content-Type:image/jpeg‘); ?????????????$image_wp=imagecreatetruecolor($new_width, $new_height); ?????????????$image = imagecreatefromjpeg($imgsrc); ?????????????imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); ?????????????imagejpeg($image_wp, $imgdst,75); ?????????????imagedestroy($image_wp); ?????????????break; ???????case 3: ???????????header(‘Content-Type:image/png‘); ?????????????$image_wp=imagecreatetruecolor($new_width, $new_height); ?????????????$image = imagecreatefrompng($imgsrc); ?????????????imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); ?????????????imagejpeg($image_wp, $imgdst,75); ?????????????imagedestroy($image_wp); ?????????????break; ?????} ?} ?/** * desription 判断是否gif动画 * @param sting $image_file图片路径 * @return boolean t 是 f 否 */function check_gifcartoon($image_file){ ?????$fp = fopen($image_file,‘rb‘); ?????$image_head = fread($fp,1024); ?????fclose($fp); ?????return preg_match("/".chr(0x21).chr(0xff).chr(0x0b).‘NETSCAPE2.0‘."/",$image_head)?false:true; ?} ?php压缩图片
原文地址：https://www.cnblogs.com/target-lyl/p/10411532.html