diff --git a/webshell/php/keywords.txt b/webshell/php/keywords.txt
index a216370..65f242b 100644
--- a/webshell/php/keywords.txt
+++ b/webshell/php/keywords.txt
@@ -4,4 +4,7 @@ call_user_func
 create_function
 preg_replace
 call_user_func_array
-array_map
\ No newline at end of file
+array_map
+system
+passthru
+exec
\ No newline at end of file