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ftp_nb_fput (
FTP\Connection


    $ftp

,
string


    $remote_filename

,
resource


    $stream

,
int


    $mode

= FTP_BINARY ,
int


    $offset

= 0
): int ftp_nb_fput() 把已打开的文件内容存储到远程 FTP 服务器本函数和 ftp_fput() 函数的区别是本函数是异步上传文件。所以在文件上传过程中，你的程序还可以执行其他操作。 <?php

$file = 'index.php' ;

$fp = fopen ( $file , 'r' );

$ftp = ftp_connect ( $ftp_server );

$login_result = ftp_login ( $ftp , $ftp_user_name , $ftp_user_pass );

// 初始化上传
$ret = ftp_nb_fput ( $ftp , $file , $fp , FTP_BINARY );
while ( $ret == FTP_MOREDATA ) {

// 任何其他需要做的操作
echo "." ;

// 继续上传...
$ret = ftp_nb_continue ( $ftp );
}
if ( $ret != FTP_FINISHED ) {
echo "There was an error uploading the file..." ;
exit( 1 );
}

fclose ( $fp );
?>

ftp_nb_put() - 存储一个文件至 FTP 服务器（non-blocking）

ftp_nb_continue() - 连续获取／发送文件（以不分块的方式 non-blocking）

ftp_put() - 上传文件到 FTP 服务器

ftp_fput() - 上传已打开的文件到 FTP 服务器

There is an easy way to check progress while uploading a file. Just use the ftell function to watch the position in the file handle. ftp_nb_fput will increment the position as the file is transferred.

Example:

<?

$fh = fopen ($file_name, "r");
$ret = ftp_nb_fput ($ftp, $file_name, $fh, FTP_BINARY);
while ($ret == FTP_MOREDATA) {
print ftell ($fh)."\n";
$ret = ftp_nb_continue($ftp);
}
if ($ret != FTP_FINISHED) {
print ("error uploading\n");
exit(1);
}
fclose($fh);

?>

This will print out the number of bytes transferred thus far, every time the loop runs. Coverting this into a percentage is simply a matter of dividing the number of bytes transferred by the total size of the file.