Global Variables in functions

If you want to get the value of a global variable from within a function, you must define it as global within the function. So if you have something like: $x; and want to use it within a function called GetX.. First define it as global global $x; $x="something"; Now within the function: function GetX() { global $x; if ($x=="something") { echo "Has ".$x; } else { echo "Sorry has ".$x; } } If you change it outside of GetX function it should change within the function. GetX(); $x="Nothing"; //changed it globally GetX();