= 4) { [$_, $mode, $seed, $text] = $argv; $seed = (int)$seed; if ($mode === 'encrypt') { echo veil10_encrypt($text, $seed) . "\n"; } elseif ($mode === 'decrypt') { echo veil10_decrypt($text, $seed) . "\n"; } else { fwrite(STDERR, "Usage: php veil10.php \n"); exit(1); } }