diff --git a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
index cbbee60ccf..597cc8918d 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
@@ -87,11 +87,12 @@ class BinaryNode extends Node
         if (isset(self::$functions[$operator])) {
             $right = $this->nodes['right']->evaluate($functions, $values);
 
-            if ('not in' == $operator) {
-                return !call_user_func('in_array', $left, $right);
+            if ('not in' === $operator) {
+                return !in_array($left, $right);
             }
+            $f = self::$functions[$operator];
 
-            return call_user_func(self::$functions[$operator], $left, $right);
+            return $f($left, $right);
         }
 
         switch ($operator) {
diff --git a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
index 4dcb53ffa0..982a4d53de 100644
--- a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
@@ -992,7 +992,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
         $p = $this->getProcess('php -r "usleep(500000);"');
         $p->disableOutput();
         $this->setExpectedException($exception, $exceptionMessage);
-        call_user_func(array($p, $startMethod), function () {});
+        $p->{$startMethod}(function () {});
     }
 
     public function provideStartMethods()
@@ -1013,7 +1013,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
         $p->disableOutput();
         $p->start();
         $this->setExpectedException('Symfony\Component\Process\Exception\LogicException', 'Output has been disabled.');
-        call_user_func(array($p, $fetchMethod));
+        $p->{$fetchMethod}();
     }
 
     public function provideOutputFetchingMethods()
diff --git a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
index 6173784370..872f32b208 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
@@ -505,11 +505,11 @@ class PropertyAccessor implements PropertyAccessorInterface
         }
 
         foreach ($itemToRemove as $item) {
-            call_user_func(array($object, $removeMethod), $item);
+            $object->{$removeMethod}($item);
         }
 
         foreach ($itemsToAdd as $item) {
-            call_user_func(array($object, $addMethod), $item);
+            $object->{$addMethod}($item);
         }
     }