function generateInitialPopulation($ingredients, $count)
{
$pop = array();
for ($x = 0; $x < $count; $x++) {
$solution = array();
$remaining = 100;
foreach ($ingredients as $name => $ingredient) {
$amount = rand(0, $remaining);
$solution[$name] = $amount;
$remaining -= $amount;
}
$solution['score'] = calculateFitness($solution, $ingredients);
$pop[] = $solution;
}
return $pop;
}
echo "\nCalculation\n";
echo calculateChromo($population[0]);
echo "\nFitness\n";
echo calculateFitness($population[0], $target);*/
/*$crossresult = crossover($population[0], $population[1]);
print_r($crossresult);*/
/*$new = mutate($population[0]);
echo $new;*/
// Try to find the solution
$found = false;
$iterations = 0;
while (!$found) {
$totalfitness = 0;
// test and update the fitness of every chromosome in the population
for ($i = 0; $i < $POP_SIZE; $i++) {
$fitness[$i] = calculateFitness($population[$i], $target);
$totalfitness += $fitness[$i];
}
// check to see if we have found any solutions (fitness will be 999)
for ($i = 0; $i < $POP_SIZE; $i++) {
if ($fitness[$i] == 999) {
echo "Found a solution after " . $iterations . " iterations !!\n";
printChromo($population[$i]);
$found = true;
break;
}
}
// create a new population by selecting two parents at a time and creating offspring
// by applying crossover and mutation. Do this until the desired number of offspring
// have been created.
$temppop = array();
