For a recent little bit of PHP scripting, I wanted to grab an image off of a remote server (not for any nefarious purpose!) and manipulate it in PHP (with GD). Read the rest of this entry »
Over time, I've seen a wide range of scripts which for one reason or another have had the need to grab the extension from a file name or path (E.g. "gif" from "mypic.gif"). Oftentimes the solution tends to fall back on what the task appears to need: string manipulation. Though, as you'll see, this may not be the best approach to take.
Most PHP coders will know that one is able to specify variable names in the following format, generally within double-quoted strings, however much they from on it:
$str = "Hello ${username}, you look nice today.";
However, that's not the only way to use the brace syntax!
Over on TalkPHP, there is a wee contest running with the essential idea being to swap around the values belonging to two variables in 8 lines or less. There are very simple, very obvious ways of doing this which you would normally use (I don't think I've ever actually had to swap the values of two variables in real coding!) but for fun, the entire point of the contest is to be creative with the solutions.
We are presented with
$a = 1; $b = 2;
and quite simply, the aim is to end up with $a having a value of 2 and $b having a value of 1. Easy!
Using SimpleXML to acquire the conversion rates, and storing it in JSON format to be used in the conversion itself. This article introduces some rather impressive functionality to further your PHP skills.
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