What are the valid characters you can use in PHP names for variables, constants, functions, methods, classes, ...?
The manual has some mentions of the regular expres
NikiC has all of them except functions. With variable functions you can have whatever name you want, though the syntax sucks.
${'=^^='}=function(){ echo "Hello Kitty!"; }; ${'=^^='}(); //outputs "Hello Kitty!"