- <?php
- /*
- * File: CurrencyConverter.php
- * Author: Simon Jarvis
- * Copyright: 2005 Simon Jarvis
- * Date: 10/12/05
- * Link: http://www.white-hat-web-design.co.uk/articles/php-currency-conversion.php
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details:
- * http://www.gnu.org/licenses/gpl.html
- *
- */
- class CurrencyConverter {
- var $xml_file = "www.ecb.int/stats/eurofxref/eurofxref-daily.xml";
- var $mysql_host, $mysql_user, $mysql_pass, $mysql_db, $mysql_table;
- var $exchange_rates = array();
- //Load Currency Rates
- function CurrencyConverter($host,$user,$pass,$db,$tb) {
- $this->mysql_host = $host;
- $this->mysql_user = $user;
- $this->mysql_pass = $pass;
- $this->mysql_db = $db;
- $this->mysql_table = $tb;
- $this->checkLastUpdated();
- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
- $rs = mysql_select_db($this->mysql_db,$conn);
- $sql = "SELECT * FROM ".$this->mysql_table;
- $rs = mysql_query($sql,$conn);
- while($row = mysql_fetch_array($rs)) {
- $this->exchange_rates[$row['currency']] = $row['rate'];
- }
- }
- /* Perform the actual conversion, defaults to £1.00 GBP to USD */
- function convert($amount=1,$from="GBP",$to="USD",$decimals=2) {
- return(number_format(($amount/$this->exchange_rates[$from])*$this->exchange_rates[$to],$decimals));
- }
- /* Check to see how long since the data was last updated */
- function checkLastUpdated() {
- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
- $rs = mysql_select_db($this->mysql_db,$conn);
- $sql = "SHOW TABLE STATUS FROM ".$this->mysql_db." LIKE '".$this->mysql_table."'";
- $rs = mysql_query($sql,$conn);
- if(mysql_num_rows($rs) == 0 ) {
- $this->createTable();
- } else {
- $row = mysql_fetch_array($rs);
- if(time() > (strtotime($row["Update_time"])+(12*60*60)) ) {
- $this->downloadExchangeRates();
- }
- }
- }
- /* Download xml file, extract exchange rates and store values in database */
- function downloadExchangeRates() {
- $currency_domain = substr($this->xml_file,0,strpos($this->xml_file,"/"));
- $currency_file = substr($this->xml_file,strpos($this->xml_file,"/"));
- $fp = @fsockopen($currency_domain, 80, $errno, $errstr, 10);
- if($fp) {
- $out = "GET ".$currency_file." HTTP/1.1rn";
- $out .= "Host: ".$currency_domain."rn";
- $out .= "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/1.5rn";
- $out .= "Connection: Closernrn";
- fwrite($fp, $out);
- while (!feof($fp)) {
- $buffer .= fgets($fp, 128);
- }
- fclose($fp);
- $pattern = "{<Cubes*currency='(w*)'s*rate='([d.]*)'/>}is";
- preg_match_all($pattern,$buffer,$xml_rates);
- array_shift($xml_rates);
- for($i=0;$i<count($xml_rates[0]);$i++) {
- $exchange_rate[$xml_rates[0][$i]] = $xml_rates[1][$i];
- }
- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
- $rs = mysql_select_db($this->mysql_db,$conn);
- foreach($exchange_rate as $currency=>$rate) {
- if((is_numeric($rate)) && ($rate != 0)) {
- $sql = "SELECT * FROM ".$this->mysql_table." WHERE currency='".$currency."'";
- $rs = mysql_query($sql,$conn) or die(mysql_error());
- if(mysql_num_rows($rs) > 0) {
- $sql = "UPDATE ".$this->mysql_table." SET rate=".$rate." WHERE currency='".$currency."'";
- } else {
- $sql = "INSERT INTO ".$this->mysql_table." VALUES('".$currency."',".$rate.")";
- }
- $rs = mysql_query($sql,$conn) or die(mysql_error());
- }
- }
- }
- }
- /* Create the currency exchange table */
- function createTable() {
- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
- $rs = mysql_select_db($this->mysql_db,$conn);
- $sql = "CREATE TABLE ".$this->mysql_table." ( currency char(3) NOT NULL default '', rate float NOT NULL default '0', PRIMARY KEY(currency) ) ENGINE=MyISAM";
- $rs = mysql_query($sql,$conn) or die(mysql_error());
- $sql = "INSERT INTO ".$this->mysql_table." VALUES('EUR',1)";
- $rs = mysql_query($sql,$conn) or die(mysql_error());
- $this->downloadExchangeRates();
- }
- }
- ?>
- <?php
- include('CurrencyConverter.php');
- $x = new CurrencyConverter('your_host','your_username','your_password','your_database_name','your_table_name');
- echo $x->convert(2.50,'GBP','USD');
- ?>
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