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For 2023 - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Current cost in your local currency

If you're selling internationally on line, it's a nice gesture to your customers to tell them roughly what things cost in their local currency, before you charge their credit card in pounds, dollars, euros, or whatever currency you use yourself. Tables of current exchange rates are easy enough to find, but they change all the time and your site can rapidly become misleading.

The European Central Bank provides a daily set of conversion rates to and from the Euro on their web site, and those are mid-rates so that you can easily convert from (say) pounds to Euros, then on to Rand, fairly accurately. The data is available as an XML feed, and can be very easily picked up in a PHP web page:
$stuff = file("http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml");
We have a sample PHP script in operation on our web site

PHP's ability to read data from a URL as easily as it can read data from a file has a very wide range of other uses too, but you need to take care of issues such as copyright, robot exclusion and the traffic you'll generate before you write such pages. In the case of the ECB page, the page is stated to be publicly available information, and live scripts that are heavily used should be written to cache a copy of the data locally from your script as it only changes once every 24 hours.
(written 2004-09-16, updated 2006-06-05)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
H110 - PHP - HTML Web Page Data Handling
  [589] Robust PHP user inputs - (2006-02-03)
  [789] Hot answers in PHP - (2006-07-02)
  [896] PHP - good coding practise and sticky radio buttons - (2006-10-17)
  [1001] .pdf files - upload via PHP, store in MySQL, retrieve - (2006-12-19)
  [1053] Sorting people by name in PHP - (2007-01-26)
  [1136] Buffering output - why it is done and issues raised in Tcl, Perl, Python and PHP - (2007-04-06)
  [1169] Emailing as HTML (Web Page) - PHP example - (2007-04-30)
  [1831] Text formating for HTML, with PHP - (2008-10-11)
  [2025] Injection Attack if register_globals in on - PHP - (2009-02-04)
  [2046] Finding variations on a surname - (2009-02-17)
  [2107] How to tweet automatically from a blog - (2009-03-28)
  [2135] What features does this visitors browser support? (PHP) - (2009-04-22)
  [3036] Sending out an email containing HTML from within a PHP page - (2010-11-07)
  [3926] Filtering PHP form inputs - three ways, but which should you use? - (2012-11-18)


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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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