Get remote file size using URL in PHP [duplicate]

Answer 1

You must perform a HEAD request. This will tell the server that you're only interested in the HTTP headers.

stream_context_set_default(
    array(
        'http' => array(
            'method' => 'HEAD'
        )
    )
);
$headers = get_headers('http://example.com');

This will return an array of headers. You must find the content-length item which has the file size (number of bytes).