diff -r -u a/src/Illuminate/Database/Query/Builder.php b/src/Illuminate/Database/Query/Builder.php
--- a/src/Illuminate/Database/Query/Builder.php
+++ b/src/Illuminate/Database/Query/Builder.php
@@ -546,7 +546,7 @@
         );
 
         if (! $value instanceof Expression) {
-            $this->addBinding(is_array($value) ? head($value) : $value, 'where');
+            $this->addBinding($this->scalarValue($value), 'where');
         }
 
         return $this;
@@ -908,7 +908,7 @@
 
         $this->wheres[] = compact('column', 'type', 'boolean', 'not');
 
-        $this->addBinding(array_slice($values, 0, 2), 'where');
+        $this->addBinding(array_slice(Arr::flatten($values), 0, 2), 'where');
 
         return $this;
     }
@@ -1096,7 +1096,7 @@
         $this->wheres[] = compact('column', 'type', 'boolean', 'operator', 'value');
 
         if (! $value instanceof Expression) {
-            $value = is_array($value) ? head($value) : $value;
+            $value = $this->scalarValue($value);
             $this->addBinding($value, 'where');
         }
 
@@ -1358,7 +1358,7 @@
         $this->havings[] = compact('type', 'column', 'operator', 'value', 'boolean');
 
         if (! $value instanceof Expression) {
-            $this->addBinding(is_array($value) ? head($value) : $value, 'having');
+            $this->addBinding($this->scalarValue($value), 'having');
         }
 
         return $this;
@@ -2389,6 +2389,17 @@
     }
 
     /**
+     * Returns scalar type value from an unknown type of input.
+     *
+     * @param  mixed  $value
+     * @return mixed
+     */
+    protected function scalarValue($value)
+    {
+        return is_array($value) ? head(Arr::flatten($value)) : $value;
+    }
+
+    /**
      * Get the database connection instance.
      *
      * @return \Illuminate\Database\ConnectionInterface