Locate php.lang file and edit it locate gtksourceview | grep /php.lang Now i did sudo gedit /usr/share/gtksourceview-2.0/language-specs/php.lang as location of my php.lang file was /usr/share/gtksourceview-2.0/language-specs/ In php.lang file look for <property name=”globs”>*.php;*.php3;*.php4;*.phtml</property> or similar and add more file extenstions separate…
