File: src/Classes/BaseConverter.php

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File: src/Classes/BaseConverter.php
Role: Class source
Content type: text/plain
Description: Class source
Class: PHP Base Converter
Convert number representations between two bases
Author: By
Last change:
Date: 1 year ago
Size: 1,886 bytes
 

Contents

Class file image Download
<?php
/**
 * BaseConverter.
 *
 * @author Frank Nägler <mail@naegler.net>
 *
 * @link https://github.com/NeoBlack/BaseConverter
 */

namespace NeoBlack\BaseConverter;

/**
 * Class BaseConverter
 *
 * @package NeoBlack\BaseConverter
 */
class BaseConverter
{
   
/**
     * Base64 nach RFC 4648
     * @var string
     */
   
const BASE64 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_';

   
/**
     * @var string
     */
   
const BASE62 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

   
/**
     * Base32 nach RFC 4648
     * @var string
     */
   
const BASE32 = '0123456789ABCDEFGHIJKLMNOPQRSTUV';

   
/**
     * Base16 nach RFC 4648
     * @var string
     */
   
const BASE16 = '0123456789ABCDEF';

   
/**
     * Convert from any base to base 10 .
     *
     * @param string $value
     * @param string $base
     *
     * @return int
     */
   
public static function to10Base(string $value, string $base = self::BASE64): int
   
{
       
$baseLength = strlen($base);
       
$valueLength = strlen($value);
       
$result = strpos($base, $value[0]);
        for (
$i = 1; $i < $valueLength; $i++) {
           
$result = $baseLength * $result + strpos($base, $value[$i]);
        }
        return
$result;
    }

   
/**
     * Convert from base 10 to another base.
     *
     * @param int $value
     * @param string $base default static::BASE64
     *
     * @return string
     */
   
public static function toBase(int $value, string $base = self::BASE64): string
   
{
       
$baseLength = strlen($base);
       
$radix = $value % $baseLength;
       
$result = $base[$radix];
       
$tmp = floor($value / $baseLength);
        while (
$tmp) {
           
$radix = $tmp % $baseLength;
           
$tmp = floor($tmp / $baseLength);
           
$result = $base[$radix] . $result;
        }
        return
$result;
    }
}


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