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run code in 300+ PHP versions simultaneously

@ 2015-01-12T01:49:27Z

<?php

class ProceduralNumericSequenceGenerator {
    private $algo, $state;
    
    public function __construct($seed = NULL, $algo = "sha256") {
        if ($seed === NULL) {
            $seed = time();
        }
        
        if (array_search($algo, hash_algos()) === FALSE) {
            throw new RuntimeException("Hashing algorithm \"$algo\" is not available.");
        }
        
        $this->state = $seed;
        $this->algo = $algo;
    }
    
    public function getInt() {
        return hexdec(substr($this->state, 0, PHP_INT_SIZE));
    }
    
    public function advance() {
        $this->state = hash($this->algo, $this->state);
    }
    
    public function advanceNew() {
        $new = clone $this;
        $new->advance();
        return $new;
    }
    
    public function advanceAndGetInt() {
        $this->advance();
        return $this->getInt();
    }
    
    public function advanceNewAndGetInt() {
        $new = $this->advanceNew();
        return [$new->getInt(), $new];
    }
}

$rng = new ProceduralNumericSequenceGenerator(time());
var_dump($rng->advanceAndGetInt());
$rng2 = clone $rng;
var_dump($rng->advanceAndGetInt());
var_dump($rng2->advanceAndGetInt());

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1: int(728083863) int(3274895661) int(3274895661)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/H1d3E on line 40
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/H1d3E on line 40
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/H1d3E on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/H1d3E on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/H1d3E on line 4
Process exited with code 255.

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