stream_notification_callback

A callback function for the notification context parameter

void **** int $notification_code int $severity  $message int $message_code int $bytes_transferred int $bytes_max

A function, used by the , called during an event. callablenotification context parameter

Opmerking: > This is a real function, only a prototype of how the function should be. not

notification_code One of the notification constants. STREAM_NOTIFY_*

severity One of the notification constants. STREAM_NOTIFY_SEVERITY_*

messagePassed if a descriptive message is available for the event.

message_codePassed if a descriptive message code is available for the event.

The meaning of this value is dependent on the specific wrapper in use.

bytes_transferred If applicable, the will be populated. bytes_transferred

bytes_max If applicable, the will be populated. bytes_max

return.void

Voorbeeld: example

<?php
function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {

    switch($notification_code) {
        case STREAM_NOTIFY_RESOLVE:
        case STREAM_NOTIFY_AUTH_REQUIRED:
        case STREAM_NOTIFY_COMPLETED:
        case STREAM_NOTIFY_FAILURE:
        case STREAM_NOTIFY_AUTH_RESULT:
            var_dump($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max);
            /* Ignore */
            break;

        case STREAM_NOTIFY_REDIRECTED:
            echo "Being redirected to: ", $message;
            break;

        case STREAM_NOTIFY_CONNECT:
            echo "Connected...";
            break;

        case STREAM_NOTIFY_FILE_SIZE_IS:
            echo "Got the filesize: ", $bytes_max;
            break;

        case STREAM_NOTIFY_MIME_TYPE_IS:
            echo "Found the mime-type: ", $message;
            break;

        case STREAM_NOTIFY_PROGRESS:
            echo "Made some progress, downloaded ", $bytes_transferred, " so far";
            break;
    }
    echo "\n";
}

$ctx = stream_context_create();
stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));

file_get_contents("http://php.net/contact", false, $ctx);
?>

Connected...
Found the mime-type: text/html; charset=utf-8
Being redirected to: http://no.php.net/contact
Connected...
Got the filesize: 0
Found the mime-type: text/html; charset=utf-8
Being redirected to: http://no.php.net/contact.php
Connected...
Got the filesize: 4589
Found the mime-type: text/html;charset=utf-8
Made some progress, downloaded 0 so far
Made some progress, downloaded 0 so far
Made some progress, downloaded 0 so far
Made some progress, downloaded 1440 so far
Made some progress, downloaded 2880 so far
Made some progress, downloaded 4320 so far
Made some progress, downloaded 5760 so far
Made some progress, downloaded 6381 so far
Made some progress, downloaded 7002 so far

Voorbeeld: Simple progressbar for commandline download client

<?php
function usage($argv) {
    echo "Usage:\n";
    printf("\tphp %s <http://example.com/file> <localfile>\n", $argv[0]);
    exit(1);
}

function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
    static $filesize = null;

    switch($notification_code) {
    case STREAM_NOTIFY_RESOLVE:
    case STREAM_NOTIFY_AUTH_REQUIRED:
    case STREAM_NOTIFY_COMPLETED:
    case STREAM_NOTIFY_FAILURE:
    case STREAM_NOTIFY_AUTH_RESULT:
        /* Ignore */
        break;

    case STREAM_NOTIFY_REDIRECTED:
        echo "Being redirected to: ", $message, "\n";
        break;

    case STREAM_NOTIFY_CONNECT:
        echo "Connected...\n";
        break;

    case STREAM_NOTIFY_FILE_SIZE_IS:
        $filesize = $bytes_max;
        echo "Filesize: ", $filesize, "\n";
        break;

    case STREAM_NOTIFY_MIME_TYPE_IS:
        echo "Mime-type: ", $message, "\n";
        break;

    case STREAM_NOTIFY_PROGRESS:
        if ($bytes_transferred > 0) {
            if (!isset($filesize)) {
                printf("\rUnknown filesize.. %2d kb done..", $bytes_transferred/1024);
            } else {
                $length = (int) (($bytes_transferred/$filesize)*100);
                printf("\r[%-100s] %d%% (%2d/%2d kb)", str_repeat("=", $length). ">", $length, ($bytes_transferred/1024), $filesize/1024);
            }
        }
        break;
    }
}

isset($argv[1], $argv[2]) or usage($argv);

$ctx = stream_context_create();
stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));

$fp = fopen($argv[1], "r", false, $ctx);
if (is_resource($fp) && file_put_contents($argv[2], $fp)) {
    echo "\nDone!\n";
    exit(0);
}

$err = error_get_last();
echo "\nErrrrrorr..\n", $err["message"], "\n";
exit(1);
?>

 Executing the example above with:
  will output something similar too:
`php -n fetch.php
 http://no2.php.net/get/php-5-LATEST.tar.bz2/from/this/mirror
 php-latest.tar.bz2`

Connected...
Mime-type: text/html; charset=utf-8
Being redirected to: http://no2.php.net/distributions/php-5.2.5.tar.bz2
Connected...
Filesize: 7773024
Mime-type: application/octet-stream
[========================================>                                                           ] 40% (3076/7590 kb)

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stream_notification_callback

stream_notification_callback

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