Simple PHP error: syntax error, unfinished class declaration

You had 4 errors:

1. Your variables $currencies and $languages had no scope. You need to declare if they are public, private or protected.
2. Your class extends itself, this is not possible, I think you need to remove the extends Driver line.
3. You had missing closing brackets on your in_array functions (lines 39 and 60)
4. You were missing a closing brace } for your Class. EDIT: This was caused when pasting the code in stackoverflow.

Fixed Code:

<?php
class Driver{

    public static $url = "http://www.com/";
    /* The method of posting data to the website */
    public static $method = "GET";
    /* The part of the url extending the domain name until the search term */
    public static $url_searchbase = "search/searchresults.aspx?N=0&Ntt=";
    /* The part of the url entailing the search term, deifining additional paramters */
    public static $url_searchtail = "&Ntk=Primary&i=0&sw=n&ps=9999&pn=1";
    private $currency;
    private $language;
    /* Allowed currencies */
    public $currencies = array("USD", "CAD");
    /* Allowed languages */
    public $languages = array("ENU");

    function __construct($currency, $language){
        if(setCurrency($currency) AND setLanguage($language)){
            return TRUE;
        } else {
            trigger_error("Currency '". $currency ."' or Language '". $language ."' not supported.", E_USER_ERROR);
            return FALSE;
        }
    }

    /*
     * Return an array of allowed currencies
     */
    public function getCurrencies(){
        return $currencies;
    }

    /*
     * Set the currency
     */
    function setCurrency($currency){
        if(in_array($currency, $this->$currencies))
        {
            $this->$currency = $currency;
            return TRUE;
        } else {
            trigger_error("Currency '". $currency ."' not supported.", E_USER_ERROR);
            return FALSE;
        }
    }

    /*
     * Return an array of allowed languages
     */
    public function getLanguages(){
        return $languages;
    }

    /*
     * Set the language
     */
    public function setLanguage($language){
            if(in_array($language, $this->$languages))
        {
            $this->$language = $language;
            return TRUE;
        } else {
            trigger_error("Language '". $language ."' not supported.", E_USER_ERROR);
            return FALSE;
        }
    }
}

/*
 * Set the currency
 */
function setCurrency($currency){
if(in_array($currency, $this->$currencies)

is missing a closing ), and the same goes for setLanguage(..)

Also class Driver extends Driver doesn't make any sense and should just be class Driver

There are a few mistakes:

1. You need to use private (or one of the other visibility options) for your $currencies and $languages class instance arrays.

2. Your setCurrency and setLanguage methods are missing a closing parenthesis on the first if(in_array( line.

Also, are you intending to extend a class called driver with a class called driver? (I very much suspect you just want to use class Driver {.)