PHP

Get an FTP Listing Entry's Last-Modified Time

Demonstrates the Chilkat Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a cached directory-listing entry as an RFC 822 date-time string. The only argument is a zero-based index.

Background: The last-modified time is the workhorse timestamp: it updates whenever a file's contents change and is what sync and mirror logic compares to decide whether a file needs re-transferring. It is the most reliably reported of the three across FTP servers, and the RFC 822 string carries a timezone so comparisons are well defined.

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<?php

use Chilkat2\Ftp2;

// Demonstrates the Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a
// cached directory-listing entry as an RFC 822 date-time string.  The only argument is a
// zero-based index.

$ftp = new Ftp2();

$ftp->Hostname = 'ftp.example.com';
$ftp->Username = 'myFtpLogin';

// Normally you would not hard-code the password in source.  You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
$ftp->Password = 'myPassword';

try {
    $ftp->Connect();

    $ftp->ChangeRemoteDir('public_html');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// GetDirCount retrieves the directory listing on the first call and returns the number of
// entries.  A negative return indicates failure.
$n = $ftp->GetDirCount();
if ($n < 0) {
    echo $ftp->LastErrorText, "\n";
    exit;
}

for ($i = 0; $i < $n; $i++) {
    $name = $ftp->GetFilename($i);

    // The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
    $lastModified = $ftp->GetLastModifiedTimeStr($i);
    echo $name, '  modified ', $lastModified, "\n";
}

try {
    $ftp->Disconnect();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}