php gd库 缩小图片_php gd等比例缩放压缩图片函数(比较不错,但高的图片,宽度会被拉伸)
600?600:$width)*0.9;
$new_height =($height>600?600:$height)*0.9;
switch($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, $height);
//75代表的是质量、压缩图片容量大小
imagejpeg($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, $height);
//75代表的是质量、压缩图片容量大小
imagejpeg($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, $height);
//75代表的是质量、压缩图片容量大小
imagejpeg($image_wp, $imgdst,75);
imagedestroy($image_wp);
break;
}
}
compressed_image('1.jpg','1-33.jpg');
compressed_image('2.jpg','2-33.jpg');
end
Tag: PHP 图片处理 图片工具