make it easier to change php configuration

src/help.rs

@@ -231,4 +231,32 @@ fn subcommand_help(command: &dyn SubCommand) {
             );
         }
     }
+
+    if let Some(details) = command.get_str("Details") {
+        println!("{}", format_details(details));
+    }
+}
+
+fn format_details(details: &str) -> String {
+    use std::fmt::Write;
+    let mut result = String::with_capacity(details.len());
+    for (i, part) in details.split("</").enumerate() {
+        let part = if i > 0 {
+            // strip the remaining close tag from the previous part
+            part.split_once('>').map(|(_, part)| part).unwrap_or(part)
+        } else {
+            part
+        };
+        let (head, tail) = part.split_once('<').unwrap_or((part, ""));
+        result.push_str(head);
+        if let Some((tag, content)) = tail.split_once('>') {
+            match tag {
+                "literal" => write!(&mut result, "{}", content.blue()).unwrap(),
+                "arg" => write!(&mut result, "{}", content.green()).unwrap(),
+                "yellow" => write!(&mut result, "{}", content.bright_yellow()).unwrap(),
+                _ => write!(&mut result, "{content}").unwrap(),
+            }
+        }
+    }
+    result
 }