php|architect's Guide to Web Scraping with PHP - Wind Business ...

32 ” HTTP Streams W rapper
$context = stream_context_create(
array(
’http’ => array(
’ignore_errors’ => true
)
)
);
$stream = fopen(’http://localhost.example/404’, ’r’, false, $context);
// $stream will be a stream resource at this point regardless of
// the outcome of the operation
$body = stream_get_contents($stream);
$meta = stream_get_meta_data($stream);
// $meta[’wrapper_data’][0] will equal something like HTTP/1.0 404
// Not Found at this point, with subsequent array elements being
// other headers
$response = explode(’ ’, $meta[’wrapper_data’][0], 3);
list($version, $status, $description) = $response;
switch (substr($status, 0, 1)) {
case ’4’:
case ’5’:
$result = false;
default:
$result = true;
}
?>
HTTP A uthentication
The HTTP stream wrapper has no context options for HTTP authentication credentials.
H o wever, it is possible to include the credentials as part of the URL being accessed.
See the example belo w . N ote that credentials are not pre-encoded; this is
handled transparently when the request is made. Also , note that this feature only
works when Basic HTTP authentication is used; Digest authentication must be handled
manually.