You need to manually install PHP5-GTK from source or one of the packages I have provided elsewhere or to just use the command-line interface, but PHP5-GTK is not packaged for Ubuntu (see LP #260235). This is also a duplicate of LP #430946.
You need to manually install PHP5-GTK from source or one of the packages I have provided elsewhere or to just use the command-line interface, but PHP5-GTK is not packaged for Ubuntu (see LP #260235). This is also a duplicate of LP #430946.