fixed #66 by reducing variables by reference

src/Storage/Adapter/Apc.php

@@ -254,7 +254,7 @@ protected function internalGetItems(array & $normalizedKeys)
         // remove namespace prefix
         $prefixL = strlen($prefix);
         $result  = [];
-        foreach ($fetch as $internalKey => & $value) {
+        foreach ($fetch as $internalKey => $value) {
             $result[substr($internalKey, $prefixL)] = $value;
         }
 
@@ -432,9 +432,9 @@ protected function internalSetItems(array & $normalizedKeyValuePairs)
 
         $prefix                = $namespace . $options->getNamespaceSeparator();
         $internalKeyValuePairs = [];
-        foreach ($normalizedKeyValuePairs as $normalizedKey => &$value) {
+        foreach ($normalizedKeyValuePairs as $normalizedKey => $value) {
             $internalKey = $prefix . $normalizedKey;
-            $internalKeyValuePairs[$internalKey] = &$value;
+            $internalKeyValuePairs[$internalKey] = $value;
         }
 
         $failedKeys = apc_store($internalKeyValuePairs, null, $options->getTtl());

src/Storage/Adapter/Memcached.php

@@ -260,8 +260,8 @@ protected function internalGetItems(array & $normalizedKeys)
         if ($result && $this->namespacePrefix !== '') {
             $tmp            = [];
             $nsPrefixLength = strlen($this->namespacePrefix);
-            foreach ($result as $internalKey => & $value) {
-                $tmp[substr($internalKey, $nsPrefixLength)] = & $value;
+            foreach ($result as $internalKey => $value) {
+                $tmp[substr($internalKey, $nsPrefixLength)] = $value;
             }
             $result = $tmp;
         }
@@ -399,8 +399,8 @@ protected function internalSetItems(array & $normalizedKeyValuePairs)
         $expiration = $this->expirationTime();
 
         $namespacedKeyValuePairs = [];
-        foreach ($normalizedKeyValuePairs as $normalizedKey => & $value) {
-            $namespacedKeyValuePairs[$this->namespacePrefix . $normalizedKey] = & $value;
+        foreach ($normalizedKeyValuePairs as $normalizedKey => $value) {
+            $namespacedKeyValuePairs[$this->namespacePrefix . $normalizedKey] = $value;
         }
 
         if (!$memc->setMulti($namespacedKeyValuePairs, $expiration)) {

test/Storage/Adapter/CommonAdapterTest.php

@@ -828,6 +828,28 @@ public function testIncrementItemReturnsFalseIfNonWritable()
         $this->assertEquals(10, $this->_storage->getItem('key'));
     }
 
+    /**
+     * @link https://github.com/zendframework/zend-cache/issues/66
+     */
+    public function testSetAndIncrementItems()
+    {
+        $this->_storage->setItems([
+            'key1' => 10,
+            'key2' => 11,
+        ]);
+
+        $result = $this->_storage->incrementItems([
+            'key1' => 10,
+            'key2' => 20,
+        ]);
+        ksort($result);
+
+        $this->assertSame([
+            'key1' => 20,
+            'key2' => 31,
+        ], $result);
+    }
+
     public function testIncrementItemsResturnsKeyValuePairsOfWrittenItems()
     {
         $this->assertTrue($this->_storage->setItem('key1', 10));
@@ -875,6 +897,28 @@ public function testDecrementItemReturnsFalseIfNonWritable()
         $this->assertEquals(10, $this->_storage->getItem('key'));
     }
 
+    /**
+     * @link https://github.com/zendframework/zend-cache/issues/66
+     */
+    public function testSetAndDecrementItems()
+    {
+        $this->_storage->setItems([
+            'key1' => 10,
+            'key2' => 11,
+        ]);
+
+        $result = $this->_storage->decrementItems([
+            'key1' => 10,
+            'key2' => 5,
+        ]);
+        ksort($result);
+
+        $this->assertSame([
+            'key1' => 0,
+            'key2' => 6,
+        ], $result);
+    }
+
     public function testDecrementItemsReturnsEmptyArrayIfNonWritable()
     {
         $this->_storage->setItem('key', 10);