diff --git a/README.md b/README.md
index 9102b66a..e7a66cf0 100644
--- a/README.md
+++ b/README.md
@@ -33,4 +33,11 @@ Documentation for Bludit v4
 -------
 There is a new branch for the Documentation in english for Bludit v4.
 
-https://github.com/bludit/documentation-english/tree/v4.0
\ No newline at end of file
+https://github.com/bludit/documentation-english/tree/v4.0
+
+PHPStan
+-------
+https://phpstan.org/
+```
+docker run --rm -v $(pwd):/app ghcr.io/phpstan/phpstan:0.12.89 analyse -c /app/phpstan.neon /app
+```
\ No newline at end of file
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 00000000..906df022
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,14 @@
+parameters:
+    phpVersion: 70100 # PHP 7.1 - https://github.com/phpstan/phpstan/blob/master/playground-api/handler.ts#L38
+    #phpVersion: 70200 # PHP 7.2
+    #phpVersion: 70300 # PHP 7.3
+    #phpVersion: 70400 # PHP 7.4
+    #phpVersion: 80000 # PHP 8.0
+    level: 0
+    excludePaths:
+        analyse:
+            - bl-kernel/helpers/simple-image.class.php
+    ignoreErrors:
+        -
+            message: '#Array has 2 duplicate keys with value#'
+            path: bl-kernel/helpers/text.class.php