diff --git a/.travis.yml b/.travis.yml
index e6486006d1..31be0eeeeb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,8 @@ php:
   - 5.4
   - 5.3
   - 7.0
+  - 7.1
+  - 7.2
   - hhvm
 
 matrix:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cff571259e..aa1ae23cbe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ All notable changes to this project will be documented in this file based on the
 
 - Introduce getFullError() for ResponseSet
 - Use the above to improve the output of getError() on Response
+- In PHP 7.2 count() now raises a warning when an invalid parameter is passed. Only arrays and objects implementing the Countable interface should be passed. Backported from [#1378](https://github.com/ruflin/Elastica/pull/1378)
 
 
 ## [2.3.1](https://github.com/ruflin/Elastica/releases/tag/2.3.1) - 2015-10-17
diff --git a/lib/Elastica/Filter/GeoPolygon.php b/lib/Elastica/Filter/GeoPolygon.php
index 86ca2b8025..3eac6c97a8 100644
--- a/lib/Elastica/Filter/GeoPolygon.php
+++ b/lib/Elastica/Filter/GeoPolygon.php
@@ -53,4 +53,14 @@ public function toArray()
             ),
         );
     }
+
+    /**
+     * @inheritdoc
+     *
+     * @return int
+     */
+    public function count()
+    {
+        return count($this->_key);
+    }
 }
diff --git a/lib/Elastica/Param.php b/lib/Elastica/Param.php
index 098a7421de..c27c439786 100644
--- a/lib/Elastica/Param.php
+++ b/lib/Elastica/Param.php
@@ -10,7 +10,7 @@
  *
  * @author Nicolas Ruflin <spam@ruflin.com>
  */
-class Param implements ArrayableInterface
+class Param implements ArrayableInterface, \Countable
 {
     /**
      * Params.
@@ -188,4 +188,14 @@ public function getParams()
     {
         return $this->_params;
     }
+
+    /**
+     * @inheritdoc
+     *
+     * @return int
+     */
+    public function count()
+    {
+        return count($this->_params);
+    }
 }
diff --git a/lib/Elastica/Query.php b/lib/Elastica/Query.php
index 2cddfeb50e..a91016c1cd 100644
--- a/lib/Elastica/Query.php
+++ b/lib/Elastica/Query.php
@@ -401,7 +401,7 @@ public function toArray()
             unset($this->_params['facets']);
         }
 
-        if (isset($this->_params['post_filter']) && 0 === count($this->_params['post_filter'])) {
+        if (isset($this->_params['post_filter']) && 0 === count(($this->_params['post_filter'])->toArray())) {
             unset($this->_params['post_filter']);
         }
 
diff --git a/lib/Elastica/ResultSet.php b/lib/Elastica/ResultSet.php
index f1260e4f87..382415eb4a 100644
--- a/lib/Elastica/ResultSet.php
+++ b/lib/Elastica/ResultSet.php
@@ -297,7 +297,7 @@ public function getQuery()
      */
     public function count()
     {
-        return sizeof($this->_results);
+        return count($this->_results);
     }
 
     /**
diff --git a/test/lib/Elastica/Test/Filter/GeoPolygonTest.php b/test/lib/Elastica/Test/Filter/GeoPolygonTest.php
index b56f73b04f..0cf36a2933 100644
--- a/test/lib/Elastica/Test/Filter/GeoPolygonTest.php
+++ b/test/lib/Elastica/Test/Filter/GeoPolygonTest.php
@@ -50,7 +50,8 @@ public function testGeoPoint()
 
         $query = new Query(new MatchAll());
         $query->setPostFilter($geoFilter);
-        $this->assertEquals(1, $type->search($query)->count());
+        $a = $type->search($query);
+        $this->assertEquals(1, $a->count());
 
         // Both points should be inside
         $query = new Query();
diff --git a/test/lib/Elastica/Test/ResponseTest.php b/test/lib/Elastica/Test/ResponseTest.php
index 77fc1482b3..6e44abac4f 100644
--- a/test/lib/Elastica/Test/ResponseTest.php
+++ b/test/lib/Elastica/Test/ResponseTest.php
@@ -200,6 +200,6 @@ public function testGetDataEmpty()
             Request::GET
         )->getData();
 
-        $this->assertEquals(0, count($response));
+        $this->assertNull($response);
     }
 }