Sams Teach Yourself PHP in 24 Hours, Third Edition

Q&A

Q1:	Apart from the global keyword, is there any way that a function can access and change global variables?
A1:	You can also access global variables anywhere in your scripts with a built-in associative array called $GLOBALS. To access a global variable called $test within a function, you could reference it as $GLOBALS['test'] You can learn more about associative arrays in the next hour. You can also change global variables from within a function if it has been passed in by reference.
Q2:	Can you include a function call within a string, as you can with a variable?
A2:	No. You must call functions outside quotation marks.