Ngoprek Web

Couple days ago, i was asked by a friend to make a small currency exchange script in PHP. With slow internet connection and so short amount of time, the best thing i could think of was grabbing the number from available currency rate site like this. With curl and PCRE function, i finished the script in no time. :p

That’s evil of course.

So, i create the following script as my apology. I use FoxRate currency converter API. Be careful though, you can not run the script too fast, wait for awhile before sending the next request. That’s what happen when you use a free web service. I guess.

Anyway, it’s 2 a.m in the morning here. Gotto go to bed. Night night.

function convertcurrency($from,$to,$amount)
{
  $xml = "
<?xml version='1.0'?>
<methodcall>
  <methodname>foxrate.currencyConvert</methodname>
  <params>
    <param>
      <value>
        <string>$from</string>
      </value>
    </param>
    <param>
      <value>
        <string>$to</string>
      </value>
    </param>
    <param>
      <value>
        <double>$amount</double>
      </value>
    </param>
  </params>
</methodcall>";

  $url = "http://www.foxrate.org";

  $header  = "POST /rpc/ HTTP/1.0 \\r\\n";
  $header .= "Host: foxrate.org \\r\\n";
  $header .= "MIME-Version: 1.0 \\r\\n";
  $header .= "Content-length: ".strlen($xml)." \\r\\n";
  $header .= "Content-transfer-encoding: text \\r\\n";
  $header .= "Document-type: Request \\r\\n";
  $header .= "Connection: close \\r\\n\\r\\n";
  $header .= $xml;

  $ch = curl_init($url);
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $header);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

  $xmlresponse = curl_exec($ch);
  curl_close($ch);

  $sxml = new SimpleXMLElement($xmlresponse);
  $xxml = $sxml->xpath("params/param/value/struct/member");

  foreach ( $xxml as $v )
  {
    if ( $v->name == "flerror" )
    {
      $errflag = $v->value->int;
    }

    if ( !$errflag )
    {
      return false;
      break;
    }

    if ( $v->name == "amount" )
    {
      return $v->value->double;
    }
  }
}

Sample usage:

$ret = convertcurrency("JPY","IDR",1);

if ( $ret )
{
  echo "1 JPY = $ret IDR";
}
else
{
  echo "Wrong currency code or you're too fast to fetch, wait for awhile.";
}

If you like to follow everything using your feed reader, you might also want to read your Apache log in feed. Well, you need to try Apache Log Analyzer 2 Feed.

ApacheLogAnalyzer2Feed is an object oriented class, written in PHP 5, for parsing/filtering an Apache log file and convert it into feed.

You can filter out which part of your Apache log you’d like to see. For example, you can generate a feed that shows you when Google Bot visit your blog or when your visitor register, etc. See some sample codes here.

Here’s the sample output from my Apache log,

<rss>
<channel>
<title>Log /usr/local/apache2/logs/access_logs filtered by 1 filters</title>
<description>Array
(
    [0] => Array
        (
            [0] => Request
            [1] => regexp:generator\.php
            [2] => IS
        )

)
</description>
<link>/log.php</link>
<lastbuilddate>Wed, 06 Jun 2007 21:20:08 +0100</lastbuilddate>
<generator>FeedCreator 1.7.2-ppt ([email protected])</generator>
<item>
<title>192.168.1.99 - GET /generator.php HTTP/1.0</title>
<link>/log.php</link>
<description>Array
(
    [Remote-Host] => 192.168.1.99
    [Remote-Logname] => -
    [Remote-User] => -
    [Time] => [06/Jun/2007:21:17:26 +0700]
    [Request] => GET /generator.php HTTP/1.0
    [Final-Status] => 200
    [Bytes-Sent] => 9274
    [Referer] => -
    [User-Agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4
)
</description>
<pubdate>Wed, 06 Jun 2007 21:17:26 +0100</pubdate>
<guid>b27435fba04c82a72e084d0404bc442b</guid>
</item>
<item>
<title>192.168.1.99 - GET /generator.php HTTP/1.0</title>
<link>/log.php</link>
<description>Array
(
    [Remote-Host] => 192.168.1.99
    [Remote-Logname] => -
    [Remote-User] => -
    [Time] => [06/Jun/2007:21:20:02 +0700]
    [Request] => GET /generator.php HTTP/1.0
    [Final-Status] => 200
    [Bytes-Sent] => 9274
    [Referer] => -
    [User-Agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4
)
</description>
<pubdate>Wed, 06 Jun 2007 21:20:02 +0100</pubdate>
<guid>005091851cf9b076180c57ff3c5ea081</guid>
</item>
</channel>
</rss>