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diff --git a/vendor/symfony/http-kernel/DataCollector/Util/ValueExporter.php b/vendor/symfony/http-kernel/DataCollector/Util/ValueExporter.php
new file mode 100644
index 000000000..71b090cf0
--- /dev/null
+++ b/vendor/symfony/http-kernel/DataCollector/Util/ValueExporter.php
@@ -0,0 +1,89 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\DataCollector\Util;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class ValueExporter
+{
+    /**
+     * Converts a PHP value to a string.
+     *
+     * @param mixed $value The PHP value
+     * @param int   $depth only for internal usage
+     * @param bool  $deep  only for internal usage
+     *
+     * @return string The string representation of the given value
+     */
+    public function exportValue($value, $depth = 1, $deep = false)
+    {
+        if ($value instanceof \__PHP_Incomplete_Class) {
+            return sprintf('__PHP_Incomplete_Class(%s)', $this->getClassNameFromIncomplete($value));
+        }
+
+        if (is_object($value)) {
+            if ($value instanceof \DateTime || $value instanceof \DateTimeInterface) {
+                return sprintf('Object(%s) - %s', get_class($value), $value->format(\DateTime::ATOM));
+            }
+
+            return sprintf('Object(%s)', get_class($value));
+        }
+
+        if (is_array($value)) {
+            if (empty($value)) {
+                return '[]';
+            }
+
+            $indent = str_repeat('  ', $depth);
+
+            $a = array();
+            foreach ($value as $k => $v) {
+                if (is_array($v)) {
+                    $deep = true;
+                }
+                $a[] = sprintf('%s => %s', $k, $this->exportValue($v, $depth + 1, $deep));
+            }
+
+            if ($deep) {
+                return sprintf("[\n%s%s\n%s]", $indent, implode(sprintf(", \n%s", $indent), $a), str_repeat('  ', $depth - 1));
+            }
+
+            return sprintf('[%s]', implode(', ', $a));
+        }
+
+        if (is_resource($value)) {
+            return sprintf('Resource(%s#%d)', get_resource_type($value), $value);
+        }
+
+        if (null === $value) {
+            return 'null';
+        }
+
+        if (false === $value) {
+            return 'false';
+        }
+
+        if (true === $value) {
+            return 'true';
+        }
+
+        return (string) $value;
+    }
+
+    private function getClassNameFromIncomplete(\__PHP_Incomplete_Class $value)
+    {
+        $array = new \ArrayObject($value);
+
+        return $array['__PHP_Incomplete_Class_Name'];
+    }
+}