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diff --git a/vendor/zendframework/zend-diactoros/src/PhpInputStream.php b/vendor/zendframework/zend-diactoros/src/PhpInputStream.php
new file mode 100644
index 000000000..58bd1e472
--- /dev/null
+++ b/vendor/zendframework/zend-diactoros/src/PhpInputStream.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @see       http://github.com/zendframework/zend-diactoros for the canonical source repository
+ * @copyright Copyright (c) 2015-2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
+ */
+
+namespace Zend\Diactoros;
+
+/**
+ * Caching version of php://input
+ */
+class PhpInputStream extends Stream
+{
+    /**
+     * @var string
+     */
+    private $cache = '';
+
+    /**
+     * @var bool
+     */
+    private $reachedEof = false;
+
+    /**
+     * @param  string|resource $stream
+     */
+    public function __construct($stream = 'php://input')
+    {
+        parent::__construct($stream, 'r');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        if ($this->reachedEof) {
+            return $this->cache;
+        }
+
+        $this->getContents();
+        return $this->cache;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isWritable()
+    {
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read($length)
+    {
+        $content = parent::read($length);
+        if ($content && ! $this->reachedEof) {
+            $this->cache .= $content;
+        }
+
+        if ($this->eof()) {
+            $this->reachedEof = true;
+        }
+
+        return $content;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getContents($maxLength = -1)
+    {
+        if ($this->reachedEof) {
+            return $this->cache;
+        }
+
+        $contents     = stream_get_contents($this->resource, $maxLength);
+        $this->cache .= $contents;
+
+        if ($maxLength === -1 || $this->eof()) {
+            $this->reachedEof = true;
+        }
+
+        return $contents;
+    }
+}