How to use wget in php?

You can use the exec function in PHP to execute the wget command. Here's an example:

exec("wget -O /path/to/save/file.txt http://www.example.com/file.txt");

This will download the file at http://www.example.com/file.txt and save it as /path/to/save/file.txt on the server.

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Keep in mind that the exec function can be disabled on some servers for security reasons, so it might not work on all servers.

Alternatively, you can use PHP's built-in HTTP functions, such as file_get_contents or curl, to download files from a URL. Here's an example using file_get_contents:

$file = file_get_contents("http://www.example.com/file.txt");
file_put_contents("/path/to/save/file.txt", $file);

This will download the file at http://www.example.com/file.txt and save it as /path/to/save/file.txt on the server.