seven-sgement.php

<?php
/**
 * Calculate the binary value needed to
 * display hexidecmal 0-F on a seven-segment
 * display for an ARM
 */

(strpos($argv[1], "a") !== false) ? $a = 1 : $a = 0;
(strpos($argv[1], "b") !== false) ? $b = 1 : $b = 0;
(strpos($argv[1], "c") !== false) ? $c = 1 : $c = 0;
(strpos($argv[1], "d") !== false) ? $d = 1 : $d = 0;
(strpos($argv[1], "e") !== false) ? $e = 1 : $e = 0;
(strpos($argv[1], "f") !== false) ? $f = 1 : $f = 0;
(strpos($argv[1], "g") !== false) ? $g = 1 : $g = 0;
$s = "{$f}{$g}{$e}{$d}{$c}{$b}{$a}0000000000";
$v = base_convert($s, 2, 16);
$v = str_pad($v, 8,"0",  STR_PAD_LEFT);
echo "0x{$v}\n";
?>