From 5f2b92e9bffbd558fc7dcf84c3121a1b782a05b8 Mon Sep 17 00:00:00 2001
From: Yuvi <yuval@quintly.com>
Date: Wed, 29 Jun 2016 15:55:00 +0200
Subject: [PATCH] null if invalid boolean

---
 src/BooleanParser.php      | 8 +++++++-
 src/YesNoBooleanParser.php | 8 +++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/BooleanParser.php b/src/BooleanParser.php
index e333a07..16f4b4e 100644
--- a/src/BooleanParser.php
+++ b/src/BooleanParser.php
@@ -6,7 +6,13 @@ class BooleanParser extends AbstractValueParser
 {
     protected function parse($value)
     {
-        return strtoupper($value) === 'TRUE' || strtoupper($value) === '1';
+        if (strtoupper($value) === 'TRUE' || $value === '1') {
+            return true;
+        }
+        if (strtoupper($value) === 'FALSE' || $value === '0') {
+            return false;
+        }
+        return null;
     }
 
     /**
diff --git a/src/YesNoBooleanParser.php b/src/YesNoBooleanParser.php
index f19993b..486607c 100644
--- a/src/YesNoBooleanParser.php
+++ b/src/YesNoBooleanParser.php
@@ -6,7 +6,13 @@ class YesNoBooleanParser extends AbstractValueParser
 {
     protected function parse($value)
     {
-        return strtoupper($value) === 'YES' || strtoupper($value) === 'Y';
+        if (strtoupper($value) === 'YES' || strtoupper($value) === 'Y') {
+            return true;
+        }
+        if (strtoupper($value) === 'NO' || strtoupper($value) === 'N') {
+            return false;
+        }
+        return null;
     }
 
     /**