AFG CRAWL

<?php

    //I used the simple_html_dom lib.
    //You can find it here: http://simplehtmldom.sourceforge.net/
    include_once 'lib/simple_html_dom.php';


    function getJob($link) {
        $r = Array("id" => 0, "salary" => 0);
        $r["id"] = intval(substr($link, strpos($link, "id=") + 3));
        $job = file_get_html($link);
        $r["salary"] = floatval($job->find(".price", 0)->plaintext);
        return $r;
    }


    function crawl($web, &$jobs,$pag) {
        $c = file_get_html($web);

        $ads = $c->find("tbody tr h3 a");
        foreach($ads as $ad) {  //All the ads of this page
            $s = getJob($ad->href);
            array_push($jobs, $s);
        }

        $pagin = $c->find(".paginate li .searchPaginationNext");
        if(count($pagin) != 0) { //Is not the last page.
            $pagines = $c->find(".paginate li .searchPaginationNonSelected");
            $found =  false;
            for($i = 0; $i < count($pagines) and !$found; $i++) { //To find the first valid link
                $actpag = intval(substr($pagines[$i]->href, strpos($pagines[$i]->href, "iPage=") + 6));
                if($actpag > $pag) {
                    $found = true;
                    crawl($pagines[$i]->href, $jobs, $actpag); //Call for the next valid page
                }
            }
        }
    }

    function calcAvg(&$jobs) {
        $div = 0.0;
        $sum = 0.0;
        foreach ($jobs as $job) {
            if($job["salary"] != 0) {
                $sum = $sum + $job["salary"];
                $div = $div + 1.0;
            }
        }

        return $sum/$div;
    }

    function selectedJobs(&$jobs) {
        $avg = calcAvg($jobs);
        $r = array();
        foreach($jobs as $job) {
            if($job["salary"] >= $avg) array_push($r, $job);
        }

        return $r;
    }

    $jobs = array();
    crawl("http://tests.tivort.com/index.php?page=search", $jobs, 1);
    $result = json_encode(selectedJobs($jobs));
    $json = fopen("result.json", "w");
    fwrite($json, $result);

    echo "\n";
?>