How can I check if a file exists on a remote server using PHP?

Question

How can I check if a specific file exists on a remote server using PHP via FTP connections?

Answer 1

Just check the size of a file. If the size is -1, it doesn't exist, so:

$file_size = ftp_size($ftp_connection, "example.txt");

if ($file_size != -1) {
    echo "File exists";

} else {
    echo "File does not exist";
}

If the size is 0, the file does exist, it's just 0 bytes.

Source