<?php
 
class Tools
{
    static function ifNotExist (&$mass, $exist)
    {
        if (! is_array ($mass))
        {
            $mass = array();
        }
 
        foreach ($exist as $key => $value)
        {
            if (is_int ($key))
            {
                $exist[$value] = '';
                unset ($exist[$key]);
            }
        }
    
        foreach ($exist as $key => $value)
        {
            if (! isset ($mass[$key]) 
                || (isset ($mass[$key]) && $mass[$key] === ''))
            { 
                $mass[$key] = $value;
            }
        }
    }
    
    static function addUserCoupon ($user_id)
    {
        mysql_query('
            INSERT INTO `card` (`card`, `user_id`)
            SELECT (max(`card`) + 1) as max, '.$user_id.'
            FROM `card`
        ');
        
        return mysql_insert_id();
    }

}