PHP货币换算程序代码
- <?php
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- class CurrencyConverter {
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- var $xml_file = "www.ecb.int/stats/eurofxref/eurofxref-daily.xml";
- var $mysql_host, $mysql_user, $mysql_pass, $mysql_db, $mysql_table;
- var $exchange_rates = array();
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- function CurrencyConverter($host,$user,$pass,$db,$tb) {
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- $this->mysql_host = $host;
- $this->mysql_user = $user;
- $this->mysql_pass = $pass;
- $this->mysql_db = $db;
- $this->mysql_table = $tb;
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- $this->checkLastUpdated();
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- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
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- $rs = mysql_select_db($this->mysql_db,$conn);
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- $sql = "SELECT * FROM ".$this->mysql_table;
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- $rs = mysql_query($sql,$conn);
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- while($row = mysql_fetch_array($rs)) {
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- $this->exchange_rates[$row['currency']] = $row['rate'];
- }
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- }
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- function convert($amount=1,$from="GBP",$to="USD",$decimals=2) {
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- return(number_format(($amount/$this->exchange_rates[$from])*$this->exchange_rates[$to],$decimals));
- }
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- function checkLastUpdated() {
- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
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- $rs = mysql_select_db($this->mysql_db,$conn);
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- $sql = "SHOW TABLE STATUS FROM ".$this->mysql_db." LIKE '".$this->mysql_table."'";
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- $rs = mysql_query($sql,$conn);
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- if(mysql_num_rows($rs) == 0 ) {
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- $this->createTable();
- } else {
- $row = mysql_fetch_array($rs);
- if(time() > (strtotime($row["Update_time"])+(12*60*60)) ) {
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- $this->downloadExchangeRates();
- }
- }
- }
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- 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) {
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- $out = "GET ".$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)) {
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- $buffer .= fgets($fp, 128);
- }
- fclose($fp);
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- $pattern = "{<Cubes*currency='(w*)'s*rate='([d.]*)'/>}is";
- preg_match_all($pattern,$buffer,$xml_rates);
- array_shift($xml_rates);
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- for($i=0;$i<count($xml_rates[0]);$i++) {
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- $exchange_rate[$xml_rates[0][$i]] = $xml_rates[1][$i];
- }
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- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
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- $rs = mysql_select_db($this->mysql_db,$conn);
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- foreach($exchange_rate as $currency=>$rate) {
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- if((is_numeric($rate)) && ($rate != 0)) {
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- $sql = "SELECT * FROM ".$this->mysql_table." WHERE currency='".$currency."'";
- $rs = mysql_query($sql,$conn) or die(mysql_error());
- if(mysql_num_rows($rs) > 0) {
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- $sql = "UPDATE ".$this->mysql_table." SET rate=".$rate." WHERE currency='".$currency."'";
- } else {
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- $sql = "INSERT INTO ".$this->mysql_table." VALUES('".$currency."',".$rate.")";
- }
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- $rs = mysql_query($sql,$conn) or die(mysql_error());
- }
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- }
- }
- }
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- function createTable() {
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- $conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pass);
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- $rs = mysql_select_db($this->mysql_db,$conn);
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- $sql = "CREATE TABLE ".$this->mysql_table." ( currency char(3) NOT NULL default '', rate float NOT NULL default '0', PRIMARY KEY(currency) ) ENGINE=MyISAM";
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- $rs = mysql_query($sql,$conn) or die(mysql_error());
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- $sql = "INSERT INTO ".$this->mysql_table." VALUES('EUR',1)";
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- $rs = mysql_query($sql,$conn) or die(mysql_error());
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- $this->downloadExchangeRates();
- }
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- }
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- ?>
上面的代码复制到一个新文件并将其保存为CurrencyConverter.php。当你需要转换包含类文件,称为“转换”功能。你需要输入自己的mysql数据库变量如登录详细信息。下面的例子将£2.50英镑转换成美元(美元)。
- <?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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