PHP和MySQL函数返回

So I have this piece of code, it's for image upload system:

return (getBoolPreference('enableField#images@items'));

I have never seen # and @ at codes. If you could say what this return does and what is the meaning of # and @, I would be grateful

'enableField#images@items' is nothing more than a string for PHP in that syntax. Only your getBoolPreference function can tell how that string is used in your program.

Your return statement returns the output of getBoolPreference generated when a string 'enableField#images@items' is passed to it, nothing more, nothing less.