Example 19-1. Getting the title of a remote
page
<?php
$file = fopen ("http://www.example.com/", "r");
if (!$file) {
echo "<p>Unable to open remote file.\n";
exit;
}
while (!feof ($file)) {
$line = fgets ($file, 1024);
/* This only works if the title and its tags are on one
line */
if (eregi ("<title>(.*)</title>",
$line, $out)) {
$title = $out[1];
break;
}
}
fclose($file);
?>
You can also write to files on an FTP server (provided that
you have connected as a user with the correct access rights).
You can only create new files using this method; if you
try to overwrite a file that already exists, the fopen()
call will fail.
To connect as a user other than 'anonymous', you need to
specify the username (and possibly password) within the
URL, such as 'ftp://user:password@ftp.example.com/path/to/file'.
(You can use the same sort of syntax to access files via
HTTP when they require Basic authentication.)
Example 19-2. Storing data on a remote server
<?php
$file = fopen ("ftp://ftp.example.com/incoming/outputfile",
"w");
if (!$file) {
echo "<p>Unable to open remote file for writing.\n";
exit;
}
/* Write the data here. */
fwrite ($file, $_SERVER['HTTP_USER_AGENT'] . "\n");
fclose ($file);
?>
Note: You might get the idea from the example above that
you can use this technique to write to a remote log file.
Unfortunately that would not work because the fopen() call
will fail if the remote file already exists. To do distributed
logging like that, you should take a look at syslog().
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