Filter Request Data

filter.php

function sanitize($data){
    trim($data);
    htmlspecialchars($data);
    htmlentities($data);
    strip_tags($data);
    return $data;
}


foreach ($_REQUEST as $key => $value) {
    sanitize($value);
}

//use them as normal

$facebook_link =  isset($_REQUEST['facebook_url']) ? $_REQUEST['facebook_url'] : null;
$twitter_link =  isset($_REQUEST['twitter_url']) ? $_REQUEST['twitter_url'] : null;
$linkedin =  isset($_REQUEST['linkedin_url']) ? $_REQUEST['linkedin_url'] : null;
$website =  isset($_REQUEST['website_url']) ? $_REQUEST['website_url'] : null;
$fax =  isset($_REQUEST['fax']) ? $_REQUEST['fax'] : null;
$logo =  isset($_FILES['logo']) ? $_FILES['logo'] : null;
$rcc =  isset($_REQUEST['reg_no']) ? $_REQUEST['reg_no'] : null;