问题
I want to save a remote img-file to my server, but I don't know how to do.
The image url is http://img.youtube.com/vi/Rz8KW4Tveps/1.jpg and 1.jpg is to be saved and renamed to imgfolder/imgID.jpg
回答1:
You can use file_get_contents() to load the remote image to a binary string inside your PHP script (file access in PHP often accepts URLs to access remote resources - this is very handy), then store that file somewhere where you have write access. Here is a very simple example:
$image = file_get_contents("http://img.youtube.com/vi/Rz8KW4Tveps/1.jpg");
file_put_contents("imgfolder/imgID.jpg", $image);
Tada!
回答2:
If the URL stream wrappers are allowed, you can do it in 1 line rather than having to load it into a var:
copy('http://img.youtube.com/vi/Rz8KW4Tveps/1.jpg', 'imgfolder/imgID.jpg');
This is much less likely to cause a problem with PHP running out of memory.
来源：https://stackoverflow.com/questions/1371966/save-remote-img-file-to-server-with-php