Online PHP editor | rfc for LB3uK

@ 2013-03-02T22:01:59Z

<?php

class Bijective {
  
    /**
     *
     * @var string
     */
    private $dictionary = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
  
    /**
     * CTOR 
     */
    public function __construct() {
        $this->dictionary = str_split($this->dictionary);
    }
  
    /**
     *
     * @param int $i
     * @return string
     */
    public function encode($i) {
        if ($i == 0)
            return $this->dictionary[0];
  
        $result = '';
        $base = count($this->dictionary);
  
        while ($i > 0) {
            $result[] = $this->dictionary[($i % $base)];
            $i = floor($i / $base);
        }
  
        $result = array_reverse($result);
  
        return join("", $result);
    }
  
    /**
     *
     * @param string $input
     * @return int
     */
    public function decode($input) {
        $i = 0;
        $base = count($this->dictionary);
  
        $input = str_split($input);
  
        foreach ($input as $char) {
            $pos = array_search($char, $this->dictionary);
  
            $i = $i * $base + $pos;
        }
  
        return $i;
    }
  
}

$b=new Bijective();
echo $b->decode('d5iskrr');
echo '<br />';
echo $b->encode(222742818279);
echo '<br />';
echo $b->encode(222742818278);

Output for git.master, git.master_jit, rfc.property-hooks: 222742818279<br /> Fatal error: Uncaught Error: [] operator not supported for strings in /in/LB3uK:31 Stack trace: #0 /in/LB3uK(65): Bijective->encode(222742818279) #1 {main} thrown in /in/LB3uK on line 31
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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