Please note that the callback function never gets called when the stream is (at least) of type socket. It is probably the same for the file:// proto although I've not done further tests.
I'm using php 5.3.3.
PHP - Manual: stream_notification_callback
2024-11-13
stream_notification_callback
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
stream_notification_callback — A callback function for the notification context parameter
说明
stream_notification_callback(
int
int
string
int
int
int
): void
int
$notification_code,int
$severity,string
$message,int
$message_code,int
$bytes_transferred,int
$bytes_max): void
A callable function, used by the notification context parameter, called during an event.
注意:
This is not a real function, only a prototype of how the function should be.
参数
-
notification_code -
One of the
STREAM_NOTIFY_*notification constants. -
severity -
One of the
STREAM_NOTIFY_SEVERITY_*notification constants. -
message -
Passed if a descriptive message is available for the event.
-
message_code -
Passed if a descriptive message code is available for the event.
The meaning of this value is dependent on the specific wrapper in use.
-
bytes_transferred -
If applicable, the
bytes_transferredwill be populated. -
bytes_max -
If applicable, the
bytes_maxwill be populated.
返回值
没有返回值。
范例
示例 #1 stream_notification_callback() example
<?php
function stream_notification_callback($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 "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, $ctx);
?>
以上例程的输出类似于：
Connected... Found the mime-type: text/html; charset=utf-8 Being redirected to: http://no.php.net/contact Connected... Got the filesize: 0 Found the mime-type: text/html; charset=utf-8 Being redirected to: http://no.php.net/contact.php Connected... Got the filesize: 4589 Found the mime-type: text/html;charset=utf-8 Made some progress, downloaded 0 so far Made some progress, downloaded 0 so far Made some progress, downloaded 0 so far Made some progress, downloaded 1440 so far Made some progress, downloaded 2880 so far Made some progress, downloaded 4320 so far Made some progress, downloaded 5760 so far Made some progress, downloaded 6381 so far Made some progress, downloaded 7002 so far
示例 #2 Simple progressbar for commandline download client
<?php
function usage($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 "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:
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:
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)
add a note
User Contributed Notes 2 notes
recycling dot sp dot am at gmail dot com ¶
11 years ago
billynoah at gmail dot com ¶
5 years ago
A couple of notes regarding the examples here (I'm using PHP 7.0.18):
1) fopen() did not provide STREAM_NOTIFY_PROGRESS for me but `file_get_contents()` worked fine.
2) The bytes transferred when transferring a zip file seems to always be shy by 8192 (8k). This varies depending on filetype and also breaks STREAM_NOTIFY_PROGRESS when the filesize is below 8k. I modified the function and it's now displaying the correct amount transferred and percentage downloaded on zip files above 8k. I'm not sure why the callback is so inconsistent but hopefully this is helpful to someone. This was also modified to only display progress:
<?php
$ctx = stream_context_create();
stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));
$fileData = @file_get_contents('http://example.com/test.zip',false,$ctx);
function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
static $filesize = null;
switch($notification_code) {
case STREAM_NOTIFY_FILE_SIZE_IS:
$filesize = $bytes_max;
break;
case STREAM_NOTIFY_CONNECT:
echo "Connected...\n";
break;
case STREAM_NOTIFY_PROGRESS:
if ($bytes_transferred > 0 && $filesize >= 8192) {
$bytes_transferred += 8192;
if (!isset($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;
}
}
?>
官方地址：https://www.php.net/manual/en/function.stream-notification-callback.php
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