PHP Coding Standard: SPACE OPERATOR SPACE

replace most
(['"a-zA-Z_0-9\])])\.(['"$a-zA-Z_])
with
\1 . \2
Make utility functions public static (bugfix)
Bugfix: Fixed wrong replacing
Simplified GsItem constructor function
One space between op1 + op2
Refactored and fixed PHP function copyItem
Refactored and fixed PHP function deleteItem
Proper array iteration; code style improved
Renamed some functions xxxItem to xxxItems