PrimeNumber.php

PrimeNumber.php

<?php

/**
 * This file is part of the planetubuntu proyect.
 * 
 * Copyright (c)
 * Daniel González <daniel.gonzalez@freelancemadrid.es> 
 * 
 * This source file is subject to the MIT license that is bundled
 * with this package in the file LICENSE.
 */

/**
 * 
 * Description of PrimeNumbers
 *
 * @author : Daniel González <daniel.gonzalez@freelancemadrid.es> 
 * @file : PrimeNumbers.php , UTF-8
 * @date : Apr 23, 2013 , 8:31:33 PM
 */
class PrimeNumbers {

    /**
     *
     * @var array
     */
    protected $primes = array();

    /**
     *
     * @var int 
     */
    protected $from = 0;

    /**
     *
     * @var int 
     */
    protected $to = 0;

    /**
     * 
     * @param string $from
     * @param type $to
     */
    public function calculate($from, $to) {
        $this->from = (int) $from;
        $this->to = (int) $to;
        $this->primes[] = array();
        for ($i = $this->from; $i <= $this->to; $i++) {
            if (self::isPrime($i)) {
                $this->primes[] = $i;
            }
        }
    }

    /**
     * 
     * @param type $number
     * @return boolean
     */
    protected function isPrime($number) {
        if ($number == 1) {
            return true;
        }
        for ($i = 2; $i < $number; $i++) {
            if ($number % $i == 0) {
                return false;
            }
        }
        return true;
    }

}

$p = new PrimeNumbers();
print_r($p->calculate(pow(10, 4), pow(10, 4) * 4));