(PHP Extension) File Existence Check

Testing to see if a file exists on the FTP server. The GetSizeByName method is a convenient way to check if a file exists. It will return -1 if the file does not exist, otherwise it returns the size of the file in bytes.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$ftp = new CkFtp2();

$ftp->put_Hostname('ftp.example.com');
$ftp->put_Username('username');
$ftp->put_Password('password');

// Connect and login to the FTP server.
$success = $ftp->Connect();
if ($success != true) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

// Set the current remote directory to where the file is located:
$success = $ftp->ChangeRemoteDir('something');
if ($success != true) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

// Test to see if the file exists by getting the file size by name. 
// If a -1 is returned, the file does not exist.
$fileSize = $ftp->GetSizeByName('test123.txt');
if ($fileSize < 0) {
    print 'file does not exist' . "\n";
}
else {
    print 'file exists and is ' . $fileSize . ' bytes in size' . "\n";
}

$success = $ftp->Disconnect();

?>