Viewing file:  BaseConvert.class.php (1.63 KB) -rw-r--r--
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<?php
/**
* BaseConvert class,
* converts an unsigned base 10 integer to a different base and vice versa.
* ______________________________________________________________
* BaseConvert
* |
* |________ constructor(newBase:string)
* | uses newBase string var for convertion
* | [i.e. "0123456789abcdef" for an hex convertion]
* |
* |________ toBase(unsignedInteger:uint):string
* | return base value of input
* |
* |________ fromBase(baseString:string):uint
* return base 10 integer value of base input
* --------------------------------------------------------------
* REMEMBER: PHP < 6 doesn't work correctly with integer greater than 2147483647 (2^31 - 1)
* --------------------------------------------------------------
* @Compatibility >= PHP 4
* @Author Andrea Giammarchi
* @Site http://www.devpro.it/
* @Date 2006/06/05
* @Version 1.0
*/
class BaseConvert {
var $base, $baseLength;
function BaseConvert($base) {
$this->base = &$base;
$this->baseLength = strlen($base);
}
function toBase($num) {
$module = 0; $result = '';
while($num) {
$result = $this->base{($module = $num % $this->baseLength)}.$result;
$num = (int)(($num - $module) / $this->baseLength);
}
return $result !== '' ? $result : $this->base{0};
}
function fromBase($str) {
$pos = 0; $len = strlen($str) - 1; $result = 0;
while($pos < $len)
$result += pow($this->baseLength, ($len - $pos)) * strpos($this->base, $str{($pos++)});
return $len >= 0 ? $result + strpos($this->base, $str{($pos)}) : null;
}
}
?>
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