PHP Binary-> Decimal - Decimal->Ternary convert

dec2ternary.php

<?php

$i = 100;

while ($i <= 150) {
	$id = $i;
	$start = microtime(true);
	$binary_id_enc = dec2bin_i($id);
	$binary_id_dec = bin2dec_i($binary_id_enc);
	echo "-------------------------------------<br />";
	echo "Our Number: <i>".$id."</i><br />";
	echo "Binary Encoded: <b>".$binary_id_enc."</b><br />";
	echo "Binary Decoded: <i>".$binary_id_dec."</i><br />";
	$ternary_id_enc = dec2ternary_i($id); // Our
	$ternary_id_dec = ternary2dec_i($ternary_id_enc); // Our
	echo "=>Ternary Encoded: <b>".$ternary_id_enc."</b><br />";
	echo "Ternary Decoded: <i>".$ternary_id_dec."</i><br />";
	$encrypted_string = num2alpha($ternary_id_enc);
	$decrypted_string = alpha2num($encrypted_string);
	echo "ENCRYPTED ENCODED: <b>".$encrypted_string."</b><br />";
	echo "=>ENCRYPTED DECODED: <i>".$decrypted_string."</i><br />";	

	$encrypted_final = str2hex($encrypted_string);
	$decrypted_final = hex2str($encrypted_final);
	echo "ENCRYPTED FINAL: <b>".$encrypted_final."</b><br />";
	echo "=>DECRYPTED FINAL: <i>".$decrypted_final."</i><br />";
	$time_taken = microtime(true) - $start;
	echo "Processing time: <i>".$time_taken."</i><br />";
	$i++;
}
/* Convert Decimal to Binary */
function dec2bin_i($decimal_i){
 bcscale(0);

 $binary_i = '';
 do
  {
   $binary_i = bcmod($decimal_i,'2') . $binary_i;
   $decimal_i = bcdiv($decimal_i,'2');
  } while (bccomp($decimal_i,'0'));

 return($binary_i);
}
/* Convert Binary to Decimal */
function bin2dec_i($binary_i){
 bcscale(0);

 $decimal_i = '0';
 for ($i = 0; $i < strlen($binary_i); $i++)
   {
    $decimal_i = bcmul($decimal_i,'2');
    $decimal_i = bcadd($decimal_i,$binary_i[$i]);
   }
 
 return($decimal_i);
}
/* Convert Decimal to Ternary */
function dec2ternary_i($decimal_i){
 bcscale(0);

 $binary_i = '';
 do
  {
   $binary_i = bcmod($decimal_i,'3') . $binary_i;
   $decimal_i = bcdiv($decimal_i,'3');
  } while (bccomp($decimal_i,'0'));

 return($binary_i);
}
/* Convert Ternary to Decimal  */
function ternary2dec_i($ternary_i){
 bcscale(0);

 $decimal_i = '0';
 for ($i = 0; $i < strlen($ternary_i); $i++)
   {
    $decimal_i = bcmul($decimal_i,'3');
    $decimal_i = bcadd($decimal_i,$ternary_i[$i]);
   }
 
 return($decimal_i);
}


// ENCRYPTION
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;
}

function hex2str( $hex ) {
  return pack('H*', $hex);
}

function str2hex( $str ) {
  return array_shift( unpack('H*', $str) );
}
?>