PHP Picture Manipulation

<?php
$filename = "http://pic.nipic.com/2007-12-06/2007126102233577_2.jpg";//Picture address
Get picture information
$info =getimagesize ($filename);
Get Picture Type
$type =image_type_to_extension ($info [2],false);
Create an image of the same type as the image in memory
$fun = "imagecreatefrom{$type}";
Copy the picture to memory
$image = $fun ($filename);
Manipulating pictures
1, in memory to establish a wide 300 high 200 of the true color picture
$image _thumb=imagecreatetruecolor (150, 100);
2, copy the original image to the new true color picture, and compression according to a certain proportion
Imagecopyresampled (Dst_image, Src_image, dst_x, dst_y, src_x, src_y, Dst_w, Dst_h, Src_w, Src_h)
Imagecopyresampled ($image _thumb, $image, 0, 0, 0, 0, N, N, $info [0], $info [1]);
3. Destroying the original image
Imagedestroy ($image);
Export the picture to the browser
Header ("Content-type:". $info [' MIME ']);
$funs = "image{$type}";
$funs ($image _thumb);
Save to Hard disk
$funs ($image _thumb, "Thumb_image." $type); Imagedestroy ($image _thumb);
?>

PHP Picture Manipulation