PHP

Write Text at a String Offset in a Remote SFTP File

Demonstrates the Chilkat SFtp.WriteFileText64s method, which is like WriteFileText64 but takes the byte offset as a decimal string. The arguments are the handle, the offset string, the charset, and the text.

Background: Some programming languages Chilkat targets lack a native 64-bit integer type, or make large integer literals awkward. Passing the offset as a decimal string sidesteps that entirely — the value is parsed by the library — while addressing the same large-file positions as the int64 form.

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<?php

use Chilkat2\SFtp;

// Demonstrates the SFtp.WriteFileText64s method, which is like WriteFileText64 but takes the
// byte offset as a decimal string.  The 1st argument is the handle, the 2nd is the offset string,
// the 3rd is the charset, and the 4th is the text.

$sftp = new SFtp();

// Connect, authenticate, and initialize the SFTP subsystem.
$port = 22;
try {
    $sftp->Connect('sftp.example.com', $port);

    // 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';

    $sftp->AuthenticatePw('mySshLogin', $password);

    $sftp->InitializeSftp();

    $handle = $sftp->OpenFile('subdir/hugefile.dat', 'readWrite', 'openOrCreate');

    // Supplying the offset as a string is convenient in languages without a native 64-bit integer.
    $offset = '5000000000';
    $sftp->WriteFileText64s($handle, $offset, 'utf-8', 'MARKER');

    $sftp->CloseHandle($handle);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Wrote at the string offset.\n";

$sftp->Disconnect();