Download files file_put_contents with progress

问题

I try to write code with download file and return status (downloaded bytes). To download file I use file_put_contents and it's work.

function downloadLink($link,$destination)
{
    $ctx = stream_context_create();
    stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));
    $mb_download = file_put_contents($destination, fopen($link, 'r'),null,$ctx);
    return $mb_download;
}

function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
    file_put_contents( 'progress.txt', '' );
    $fp = fopen('progress.txt', 'a' );
    fputs( $fp,$bytes_transferred);
    fclose( $fp );
    echo 1;
}

It's my functions. I have problem to use callback function because all function is inside the same class. Now stream_notification_callback is not use. I try change declaration to

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

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

But it's not working.

回答1:

You should try with

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

回答2:

After the implementation of what Matei Mihai said, it actually still does not work because the context is used in the file_put_contents() function while it should be used in the fopen() function.

Therefore this:

$mb_download = file_put_contents($destination, fopen($link, 'r'),null,$ctx);

Should actually be this:

$mb_download = file_put_contents( $destination, fopen( $link, 'r', null, $ctx) );

And then it would work!

来源：https://stackoverflow.com/questions/34292472/download-files-file-put-contents-with-progress

标签

php

callback

file-put-contents