diff --git a/pages/common/php.md b/pages/common/php.md
index ec99549fc5..395b3c41bd 100644
--- a/pages/common/php.md
+++ b/pages/common/php.md
@@ -30,3 +30,7 @@
 - Display information about the current PHP configuration:
 
 `php -i`
+
+- Display information about a specific function:
+
+`php --rf {{function_name}}`