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View Code Snippet [PHP]

Number To Alphabet

                                    function num2alpha($n) {
        $r = '';
        for ($i = 1; $n >= 0 && $i < 10; $i++) {
        $r = chr(0x41 + ($n % pow(26, $i) / pow(26, $i - 1))) . $r;
        $n -= pow(26, $i);
        }
        return $r;
    }

    function alpha2num($a) {
        $r = 0;
        $l = strlen($a);
        for ($i = 0; $i < $l; $i++) {
        $r += pow(26, $i) * (ord($a[$l - $i - 1]) - 0x40);
        }
        return $r - 1;
    }