Here’s a really cool library which makes it super-easy to generate the xml needed for AmCharts flash graphs in PHP. AmCharts-PHP Class Library

XOR (exclusive OR) is a boolean operator, like && and ||, but with the following logic: It is successful if the expression on either side is true (like ||), but not if both sides are true (like !( x && y )). Sometimes, in your JavaScript, you might want to do the following: if( foo XOR bar [...]