PHP

Check if an FTP Listing Entry is a Symbolic Link

Demonstrates the Chilkat Ftp2.GetIsSymbolicLink method, which returns whether a cached directory-listing entry is a symbolic link. The only argument is a zero-based index. This information is available only when the server's listing format reports it.

Background: Symbolic links matter because following one can lead outside the expected directory or into a cycle, so recursive operations often need to identify and skip them. Unlike the file/directory distinction, symlink information is not always present — only listing formats that mark links (typically Unix-style LIST output) expose it, and this returns false when the server does not.

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<?php

use Chilkat2\Ftp2;

// Demonstrates the Ftp2.GetIsSymbolicLink method, which returns whether a cached directory-listing
// entry is a symbolic link.  The only argument is a zero-based index.  This information is only
// available when the server's listing format reports it.

$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);
    if ($ftp->GetIsSymbolicLink($i)) {
        echo '[LINK] ', $name, "\n";
    } else {
        echo '       ', $name, "\n";
    }
}

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