如何獲取貨幣匯率並更新mysql數據庫中的舊匯率

Question

我疲於尋找有關如何獲取貨幣匯率並將其定期使用PHP存儲在我的數據庫中的解決方案。 我已經設法連接到數據庫，但是無法更新速率。

我有一個叫做Stock_currency的表

我也有稱為[貨幣] [Spot_Rate] [Sell_Rate] [Amont] [Buy_Rate]的列

這是我要更改為我的解決方案的PHP代碼

class CurrencyConverter {


       var $xml_file = "www.ecb.int/stats/eurofxref/eurofxref-daily.xml";
       var $localhost, $root, $root, $mohamed, $stock_currency;
       var $exchange_rates = array();

       //Load Currency Rates

       function CurrencyConverter($host,$user,$pass,$db,$tb) {

          $this->localhost = $host;
          $this->root = $user;
          $this->root = $pass;
          $this->mohamed = $db;
          $this->stock_currency = $tb;

          $this->checkLastUpdated();

          $conn = mysql_connect($this->localhost,$this->root,$this->root);

          $rs = mysql_select_db($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="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->localhost,$this->root,$this->root);

          $rs = mysql_select_db($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,$this->root,$this->root);

             $rs = mysql_select_db($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,$this->root,$this->root);

          $rs = mysql_select_db($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();
       }

    }

    ?> 

我已將1.00英鎊轉換為英鎊

<?php
   include('CurrencyConverter');
   $x = new CurrencyConverter('localhost','root','root','mohamed','Stock_Currency');
   echo $x->convert(1.00,'GBP','USD');
?>

這是我收到的錯誤

( ! ) Warning: include(CurrencyConverter) [<a href='function.include'>function.include</a>]: failed to open stream: No such file or directory in C:\wamp\www\Currency.php on line 2
Call Stack
#   Time    Memory  Function    Location
1   0.0005  672752  {main}( )   ..\Currency.php:0

我也不明白這個錯誤信息

( ! ) Warning: include() [<a href='function.include'>function.include</a>]: Failed opening 'CurrencyConverter' for inclusion (include_path='.;C:\php\pear') in C:\wamp\www\Currency.php on line 2
Call Stack
#   Time    Memory  Function    Location
1   0.0005  672752  {main}( )   ..\Currency.php:0

這告訴我第3行有錯誤，我不理解

( ! ) Fatal error: Class 'CurrencyConverter' not found in C:\wamp\www\Currency.php on line 3
Call Stack
#   Time    Memory  Function    Location
1   0.0005  672752  {main}( )   ..\Currency.php:0

Answer 1

錯誤消息非常簡單： include('CurrencyConverter'); 之所以失敗，是因為您的C:\\wamp\\www\\目錄中沒有名為CurrencyConverter文件。 您的意思是CurrencyConverter.php嗎？

第二條錯誤消息也抱怨CurrencyConverter不存在。 這次，它也在PHP的擴展目錄中尋找文件，但找不到該文件。

第三個錯誤是抱怨$x = new CurrencyConverter(...)因為您從未加載過CurrencyConverter類-我假設它在丟失的文件中。

通過包含該文件，可以糾正這三個錯誤消息。 具有CurrencyConverter類的PHP文件在哪里？ 您需要將文件名放在include語句中，而不是類名中。

PS-請不要使用mysql_*函數。 他們已棄用 。 使用mysqli或pdo 。