php getimagesize()函数获取图片宽度高度

//php自带函数 getimagesize()
$img_info = getimagesize("tomener.jpg");

echo "<pre>";

print_r($img_info);

输出

Array
(
[0] => 170
[1] => 254
[2] => 2
[3] => width="170" height="254"
[bits] => 8
[channels] => 3
[mime] => image/jpeg
)

list(width,height)=getimagesize("1.jpg");