DataValidation.php

<?php
/**
 * DataValidation Class
 *
 * @author James Byrne <jamesbwebdev@gmail.com>
 */

namespace Jay\System\Database;

class DataValidation
{
    private $filters = [
        'email'     => FILTER_SANITIZE_EMAIL,
        'string'    => FILTER_SANITIZE_STRING,
        'url'       => FILTER_SANITIZE_URL
    ];

    public function sanitize($data, $type, $null = true)
    {
        $data = isset($this->filters[$type]) ? filter_var($data, $this->filters[$type]) : $data;

        if (is_null($data) && $null) {
            return null;
        }

        if (is_null($data)) {
            throw new \Exception("cannot be null");
        }

        return $data;
    }
}