PHP Currency Conversion program Code _php Tutorial

A Practical PHP currency conversion program code Oh, the need for friends can refer to.

The code is as follows

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/* * 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 was 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 was distributed in the hope that it'll 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-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 is 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, $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); $pattern = "{ }is "; Preg_match_all ($pattern, $buffer, $xml _rates); Array_shift ($xml _rates); for ($i =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 (); } } ?>

Copy The above code into a new file and save it as currencyconverter.php. Whenever need to make a conversion just include the class file and the ' Convert ' function. You'll need to enter your own MySQL database variables such as the login details. The example below would convert£2.50 GBP into US Dollars ($).

The code is as follows	Copy Code
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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