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doc/config/listings.tex

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+\lstset{
+    language=PHP,
+    alsoletter={\$},
+    basicstyle=\ttfamily,
+    numbers=left,
+    frame=single,
+    breaklines=true,
+    breakatwhitespace=true,
+    columns=flexible,
+    keywordstyle=\color{blue},
+    keywordstyle=[2]\color{teal}, % Var & Useful functions.
+    keywordstyle=[3]\color{purple},
+    commentstyle=\color{lightgray}\itshape,
+    stringstyle=\color{orange},
+    numberstyle=\color{lightgray},
+    showstringspaces=false,
+    morekeywords={
+        require_once,
+        public,
+        protected,
+        private,
+        final,
+        static,
+        function,
+        return,
+        function,
+        namespace,
+        global,
+        defined,
+        class,
+        abstract,
+        interface,
+        new,
+        string,
+        int,
+    }, % PHP Keywords.
+    morekeywords=[2]{
+        \$_romhackplaza,
+        \$_romhackplaza_theme,
+        \$post_id,
+        \$this,
+        \$post_types,
+        \$context,
+    }, % Plugin useful vars.
+    morekeywords=[3]{
+        do_action,
+        add_action,
+        add_filter,
+        apply_filters,
+        CPT
+    } % Plugin & WP useful functions.
+}