What is the method for downloading and saving images in PHP?

You can utilize the following PHP code to download an image from a URL and save it to a local file:

$url = "https://example.com/image.jpg";
$filename = "image.jpg";

// 下载图片
file_put_contents($filename, file_get_contents($url));

echo "图片已成功下载并保存为 " . $filename;

Please make sure that your PHP server has sufficient permissions to save files to the specified folder. You can also use other PHP libraries to download images, such as using the cURL library to achieve the same functionality.