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Website Programming in PHP / MYSQL
stream_notification_callback
(No version information available, might be only in CVS)
stream_notification_callback — A callback function for the notification context paramater
Description
A callback function called during an event.
Note: This is not a real function, only a prototype of how the function should be.
Parameters
- notification_code
-
One of the STREAM_NOTIFY_* notification constants.
- severity
-
One of the STREAM_NOTIFY_SEVERITY_* notification constants.
- message
-
Passed if a descriptive message is available for the event.
- message_code
-
Passed 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 bytes_transferred will be populated.
- bytes_max
-
If applicable, the bytes_max will be populated.
Return Values
No value is returned.
Examples
Example #1 stream_notification_callback() 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 "Conntected...";
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(null, array("notification" => "stream_notification_callback"));
file_get_contents("http://php.net/contact", false, $ctx);
?>
The above example will output something similar to:
Conntected... Found the mime-type: text/html; charset=utf-8 Being redirected to: http://no.php.net/contact Conntected... Got the filesize: 0 Found the mime-type: text/html; charset=utf-8 Being redirected to: http://no.php.net/contact.php Conntected... Got the filesize: 4589 Found the mime-type: text/html;charset=utf-8 Made some progress, downloaded 0 so far Made some progress, downloaded 0 so far Made some progress, downloaded 0 so far Made some progress, downloaded 1440 so far Made some progress, downloaded 2880 so far Made some progress, downloaded 4320 so far Made some progress, downloaded 5760 so far Made some progress, downloaded 6381 so far Made some progress, downloaded 7002 so far
Example #2 Simple progressbar for commandline download client
<?php
function usage($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 "Conntected...\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(null, 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: php -n fetch.php http://no2.php.net/get/php-5-LATEST.tar.bz2/from/this/mirror php-latest.tar.bz2 will output something similar too:
Conntected... Mime-type: text/html; charset=utf-8 Being redirected to: http://no2.php.net/distributions/php-5.2.5.tar.bz2 Conntected... Filesize: 7773024 Mime-type: application/octet-stream [========================================> ] 40% (3076/7590 kb)
