<?php
/*
this example show how we can override one or more method to make more suitable genetic algorithm
*/
require __DIR__ . '/../vendor/autoload.php'; // composer autoload
class CustomGeneticAlgorithm extends \SimpleGeneticAlgorithm\SimpleGeneticAlgorithm{
public function crossover(){
$new_population = array();
for($i = 0; $i < $this->options['population']; $i++){
// get random parents
$a = $this->population[array_rand($this->population, 1)]['chromosome'];
$b = $this->population[array_rand($this->population, 1)]['chromosome'];
// make separator from a & b
$sp = rand(0, strlen($a) - 1);
// get some part from a, and some part from b
$child = substr($a, 0, $sp) . substr($b, $sp, strlen($b));
$new_population[] = array(
'chromosome' => $child,
'fitness' => 0,
);
}
$this->population = $new_population;
}
}
$ga = new CustomGeneticAlgorithm(array(
'mutation' => 25, // 25%
'goal' => 'Astari Ghaniarti',
'delay' => 50, // ms, if debug is false, then delay forced to 0
'debug' => true,
));
$ga->run();
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