08c10-1.php

介绍PHP5的给类型函数应用

<?php
// A script to cache the output of a graphic producing PHP script on
//  another server: First try to open a connection to the remote file.
//  If it fails then do nothing. That way if the remote server is down,
//  we don't lose our local cached version:
if ($remote = fopen('http://hubblesite.org/news/latest_big.php', 'r')) {
    // Since we were able to open it, open our cache version to output to ..
    //  again, if this fails, just exit and don't worry about it.
    if ($local = fopen('hubble_news.jpg', 'w')) {
        // We made it, copy all the data from the remote, to the local:
        stream_copy_to_stream($remote, $local);
        // Now close the files up
        fclose($remote);
        fclose($local);
    }
}
?>