PHP下一个非常全面获取图象信息的函数

<?php 
function getimageinfo(img) { //img为图象文件绝对路径 
img_info = getimagesize(img); 
switch (img_info[2]) { 
case 1: 
imgtype = "gif"; 
break; 
case 2: 
imgtype = "jpg"; 
break; 
case 3: 
imgtype = "png"; 
break; 
} 
img_type = imgtype."图像"; 
img_size = ceil(filesize(img)/1000)."k"; //获取文件大小 
new_img_info = array ( 
"width"=>img_info[0], 
"height"=>img_info[1], 
"type"=>img_type 
"size"=>img_size 
} 
return new_img_info; 
} 
?>