3v4l.org

run code in 300+ PHP versions simultaneously
<?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'):
Output for 5.3.0 - 5.3.22, 5.4.0 - 5.4.12
Parse error: syntax error, unexpected ':', expecting ',' or ';' in IkXq2 on line 63
Process exited with code 255.

preferences:
171.33 ms | 1387 KiB | 43 Q