==============================================
XML Currency Reader class
==============================================
This class implements support for xml currencies files, usually provided by central banks. It's a general class,
who must be extended with particulary classes (e.g. BNR_reader.class)
abstract class XML_currency
Variables:
abstract protected function parse_rate_contents($content, $currency = 'EUR');
abstract protected function parse_domdoc();
protected $xmlpath
protected $allow_url_fopen;
protected $xml_content;
protected $domdoc
Methods:
public function __construct()
public function parse_xml()
protected function get_xml_content()
protected function DOMconnector()
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class BNR_reader extends XML_currency
Variables:
inherited ones
protected $xmlpathl => here the URL for xml file
Methods:
inherited ones
public function parse_rate_contents($content, $currency = 'EUR')
public function parse_domdoc()
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USAGE FOR BNR READER CLASS:
==============================================
Usage is very simple, just call parse_xml method on a class object,
and then display on your page the needed value. More on index.php.
==============================================
XML FILE:
http://www.bnro.ro/nbrfxrates.xml
==============================================
==============================================
RETURNING ARRAY FORMAT:
==============================================
Array
(
[0] => National Bank of Romania
[1] => 2008-10-24
[2] => Array
(
[0] => Array
(
[currency] => AUD
[rate] => 1.8022
[multiplier] => 1
)
[1] => Array
(
[currency] => BGN
[rate] => 1.8854
[multiplier] => 1
)
...
[19] => Array
(
[currency] => XAU
[rate] => 65.5854
[multiplier] => 1
)
[20] => Array
(
[currency] => XDR
[rate] => 4.2963
[multiplier] => 1
)
)
)
==============================================
HOW TO EXTEND THE XML_CURRENCY_READER CLASS
==============================================
This is very simple. Just create a class who extends the XML_Currency_reader.class
and add some content to $xmlpath (the xml file URL), and also two particulary methods:
parse_domdoc - who parse the xml content and returns it in your specified form (depends on the xml structure)
parse_rate_contents - (optional) method used to retrieve a currency from parsed content. You can also use
a direct array approach, but this methods makes it more intuitive.
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