update 2018

orangetw · orangetw · commit f759aec364b7 · 2018-10-23T00:08:49.000Z
diff --git a/README.md b/README.md
@@ -66,7 +66,7 @@ You can contact me via:
 
 ## **One Line PHP Challenge**
   
-Difficulty: **★★★★☆**  
+Difficulty: **★★★★**  
 Solved: **3 / 1816**  
 Tag:   **PHP**
 
