PHP ActiveX

Get a Remote File's Size (32-bit)

Demonstrates the Chilkat SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a 32-bit integer. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: A 32-bit signed integer tops out near 2 GB, so this is fine for ordinary files but will misreport or fail for larger ones. When a file might exceed that, use GetFileSizeStr, which returns the size as a decimal string and cannot overflow. The two boolean arguments are shared by all the attribute getters: the first follows symbolic links to their target, and the second says whether you passed a path or an open handle.

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<?php

$success = 0;

//  Demonstrates the SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a
//  32-bit integer.  The 1st argument is the remote path (or handle), the 2nd selects whether
//  symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

$sftp = new COM("Chilkat.SFtp");

//  Connect, authenticate, and initialize the SFTP subsystem.
$port = 22;
$success = $sftp->Connect('sftp.example.com',$port);
if ($success == 0) {
    print $sftp->LastErrorText . "\n";
    exit;
}

//  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.
$password = 'mySshPassword';

$success = $sftp->AuthenticatePw('mySshLogin',$password);
if ($success == 0) {
    print $sftp->LastErrorText . "\n";
    exit;
}

$success = $sftp->InitializeSftp();
if ($success == 0) {
    print $sftp->LastErrorText . "\n";
    exit;
}

//  The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
//  The 3rd argument (bIsHandle) is 0 here because the 1st argument is a path, not an
//  open handle.
$bFollowLinks = 1;
$bIsHandle = 0;

$fileSize = $sftp->GetFileSize32('subdir/report.pdf',$bFollowLinks,$bIsHandle);
if ($fileSize < 0) {
    print $sftp->LastErrorText . "\n";
    exit;
}

print 'File size: ' . $fileSize . ' bytes' . "\n";

//  Note: For files that may exceed 2 GB, use GetFileSizeStr (returns a decimal string) instead,
//  because the value can overflow a 32-bit integer.

$sftp->Disconnect();

?>