diff --git a/thefuck/rules/php_s.py b/thefuck/rules/php_s.py
index 114fb153..65f50392 100644
--- a/thefuck/rules/php_s.py
+++ b/thefuck/rules/php_s.py
@@ -1,9 +1,10 @@
 from thefuck.utils import replace_argument, for_app
 
 
-@for_app('php')
+@for_app('php', at_least=2)
 def match(command):
-    return " -s " in command.script
+    return ('-s' in command.script_parts
+            and command.script_parts[-1] != '-s')
 
 
 def get_new_command(command):