function convert_base($code, $oldbase, $newbase)
{
// take old base an input
$base = new Math_Basex($oldbase);
//convert code to base10 decimal number
$number = $base->toDecimal($code);
//change to the new base
$base->setBase($newbase);
//encode the decimal number and return the result to the function
return $base->toBase($number);
}
/**
* Converts a number from one base into another. May be called statically.
*
* @param mixed number The number to convert
* @param int from_base The base to convert from
* @param int to_base The base to convert to
* @param string from_cs Optional character set of the number that is
* converted
* @param string to_cs Optional character set of the target number
* @return string
* @access public
*/
function baseConvert($number, $from_base, $to_base, $from_cs = null, $to_cs = null)
{
if (isset($this)) {
$obj =& $this;
} else {
$obj =& Math_Basex::instance();
}
if (!isset($from_cs)) {
$from_cs = $obj->stdBase();
}
if (!isset($to_cs)) {
$to_cs = $obj->stdBase();
}
if (strlen($from_cs) < $from_base) {
return PEAR::raiseError('Character set isn\'t long enough for the' . 'given base.');
}
if (strlen($to_cs) < $to_base) {
return PEAR::raiseError('Character set isn\'t long enough for the' . 'given base.');
}
$from_cs = substr($from_cs, 0, $from_base);
$to_cs = substr($to_cs, 0, $to_base);
if ($tmp = $obj->setBase($from_cs) !== true) {
return $tmp;
}
$number = $obj->toDecimal($number);
if (PEAR::isError($number)) {
return $number;
}
if ($tmp = $obj->setBase($to_cs) !== true) {
return $tmp;
}
$number = $obj->toBase($number);
return $number;
}
<?php
define('MATH_BASEX_MATHEXTENSION', 'none');
include_once "Math/Basex.php";
// PHASE 1: Simple toBase and toDecimal calls
$base = new Math_Basex("ABCDEF");
echo "Using character set: 'ABCDEF'\n";
echo validateResult("toBase(123456)", $base->toBase(123456), "CDFBDCA");
echo validateResult("toDecimal(\"BADA\")", $base->toDecimal("BADA"), "234");
echo "\n\n";
//PHASE 2: Testing int2
$base->setBase("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
echo "Changing to character base 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'\n";
echo validateResult("int2 (Max 65536) toBase(65432)", $base->toBase(65432), "DSUQ");
echo validateResult("int2 (Max 65536) tobase(67000) OVERFLOW!", $base->toBase(67000), "DVCY");
//PHASE 3: Testing int4
echo validateResult("int4 (Max 42944967297) toBase(64872767)", $base->toBase(64872767), "FLYZQL");
echo validateResult("int4 (Max 42944967297) tobase(43987654321) OVERFLOW!", $base->toBase(43987654309.0), "FMKGDIOB");
//PHASE $: Testing int8
echo validateResult("int8 (Max 18446744073709551616)" . " toBase(18446744073709551610)", $base->toBase(1844674409510065.0), "NBTNBSZVFVD");
echo validateResult("int8 (Max 18446744073709551616)" . " tobase(18446744073709551618) OVERFLOW!", $base->toBase("18446744098897893117"), "HLHXCZQBGYKMWB");
function validateResult($description, $result, $compareString)
{
if ((string) $result == (string) $compareString) {
$ret = "{$description}\n - PASSED\n";
} else {
$ret = "{$description}\n - FAILED - result was {$result}, " . "expecting {$compareString}\n";
}
return $ret;
}
<?php
//include BaseX class
include_once "Math/Basex.php";
//Create new instance
$base6 = new Math_Basex("ABCDEF");
//just calling some methods for testing Basex class.
echo "basex::toBase( 123456 ) --> " . $base6->toBase(123456) . " (Result: CDFBDCA)\n";
echo "basex::toDecimal( \"BADA\" ) --> " . $base6->toDecimal("BADA") . " (Result: 234)\n";
