ftp_nb

Description

int ftp_nb_get ( resource ftp_stream, string local_file, string remote_file, int mode [, int resumepos])

ftp_nb_get() retrieves remote_file from the FTP server, and saves it to local_file locally. The transfer mode specified must be either FTP_ASCII or FTP_BINARY. The difference between this function and the ftp_get() is that this function retrieves the file asynchronously, so your program can perform other operations while the file is being downloaded.

Returns FTP_FAILED, FTP_FINISHED, or FTP_MOREDATA.

Przykład 1. ftp_nb_get() example
<?php // Initate the download $ret = ftp_nb_get($my_connection, "test", "README", FTP_BINARY); while ($ret == FTP_MOREDATA) {        // Do whatever you want    echo ".";    // Continue downloading...    $ret = ftp_nb_continue($my_connection); } if ($ret != FTP_FINISHED) {    echo "There was an error downloading the file...";    exit(1); } ?>

Przykład 2. Resuming a download with ftp_nb_get()
<?php // Initate $ret = ftp_nb_get($my_connection, "test", "README", FTP_BINARY,                       filesize("test")); // OR: $ret = ftp_nb_get($my_connection, "test", "README", //                           FTP_BINARY, FTP_AUTORESUME); while ($ret == FTP_MOREDATA) {        // Do whatever you want    echo ".";    // Continue downloading...    $ret = ftp_nb_continue($my_connection); } if ($ret != FTP_FINISHED) {    echo "There was an error downloading the file...";    exit(1); } ?>

Przykład 3. Resuming a download at position 100 to a new file with ftp_nb_get()
<?php // Disable Autoseek ftp_set_option($my_connection, FTP_AUTOSEEK, false); // Initiate $ret = ftp_nb_get($my_connection, "newfile", "README", FTP_BINARY, 100); while ($ret == FTP_MOREDATA) {    /* ... */        // Continue downloading...    $ret = ftp_nb_continue($my_connection); } ?>

In the example above, "newfile" is 100 bytes smaller than "README" on the FTP server because we started reading at offset 100. If we have not have disabled FTP_AUTOSEEK, the first 100 bytes of "newfile" will be '\0'.