我正在尝试将 1 英镑兑换成其他货币，目前我正在将 1 欧元兑换成其他货币。例如 1 Eur = 0.81400 GBP，我可以将其反转并通过除以每个给我 1.228501228501229 的汇率得到 1 GBP 到 Eur。
我希望所有货币都使用这个，目前我正在使用 php 脚本来获取汇率。如何更改我的 Stock_currency 表并将 GBP 划分为所有货币并将它们存储回 Stock_currency 表
这是我的 PHPscript
<?php
class CurrencyConverter {
var $xml_file = "www.ecb.int/stats/eurofxref/eurofxref-daily.xml";
var $localhost, $sirnur, $abc123, $mohamed, $stock_currency;
var $exchange_rates = array();
//Load Currency Rates
function CurrencyConverter($host,$user,$pass,$db,$tb) {
$this->localhost = $host;
$this->sirnur = $user;
$this->abc123 = $pass;
$this->mohamed = $db;
$this->stock_currency = $tb;
$this->checkLastUpdated();
$conn = mysql_connect($this->localhost,$this->sirnur,$this->abc123);
$rs = mysql_select_db($this->mohamed,$conn);
$sql = "SELECT * FROM ".$this->stock_currency;
$rs = mysql_query($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,$from="USD",$to="GBP",$decimals=2) {
return(number_format(($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->localhost,$this->sirnur,$this->abc123);
$rs = mysql_select_db($this->mohamed,$conn);
$sql = "SHOW TABLE STATUS FROM ".$this->mohamed." LIKE '".$this->stock_currency."'";
$rs = mysql_query($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/1.1\r\n";
$out .= "Host: ".$currency_domain."\r\n";
$out .= "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/1.5\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
while (!feof($fp)) {
$buffer .= fgets($fp, 128);
}
fclose($fp);
$pattern = "{<Cube\s*currency='(\w*)'\s*rate='([\d\.]*)'/>}is";
preg_match_all($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->localhost,$this->sirnur,$this->abc123);
$rs = mysql_select_db($this->mohamed,$conn);
foreach($exchange_rate as $currency=>$rate) {
if((is_numeric($rate)) && ($rate != 0)) {
$sql = "SELECT * FROM ".$this->stock_currency." WHERE currency='".$currency."'";
$rs = mysql_query($sql,$conn) or die(mysql_error());
if(mysql_num_rows($rs) > 0) {
$sql = "UPDATE ".$this->stock_currency." SET rate=".$rate." WHERE currency='".$currency."'";
} else {
$sql = "INSERT INTO ".$this->stock_currency." VALUES('".$currency."',".$rate.")";
}
$rs = mysql_query($sql,$conn) or die(mysql_error());
}
}
}
}
/* Create the currency exchange table */
function createTable() {
$conn = mysql_connect($this->localhost,$this->sirnur,$this->abc123);
$rs = mysql_select_db($this->mohamed,$conn);
$sql = "CREATE TABLE ".$this->stock_currency." ( 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->stock_currency." VALUES('EUR',1)";
$rs = mysql_query($sql,$conn) or die(mysql_error());
$this->downloadExchangeRates();
}
}
包含文件
<?php
include('CurrencyConverter.php');
$x = new CurrencyConverter('localhost','root','root','mohamed','Stock_Currency');
// mysql_query("ALTER TABLE Stock_currency add column We_sell varchar (20) ; ") or die(mysql_error());
// mysql_query("ALTER TABLE Stock_currency add column We_buy varchar (20) ; ") or die(mysql_error());
?>