diff --git a/definitions/patterns_re.txt b/definitions/patterns_re.txt
index e90d604..1165e66 100644
--- a/definitions/patterns_re.txt
+++ b/definitions/patterns_re.txt
@@ -105,3 +105,6 @@ function\s+_[0-9]{8,}\(
 
 # escaped include with error hiding
 @include ".*?(\\x[0-9a-f]{2,}.*?){2,}.*?";
+
+# create_function is dangerous as like eval() see http://php.net/manual/en/function.create-function.php
+create_function\s*\(\s*['"]{2}
\ No newline at end of file