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msd2/phpBB3/vendor/symfony/polyfill-php54/Php54.php

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+<?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\Polyfill\Php54;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+final class Php54
+{
+    public static function hex2bin($data)
+    {
+        $len = \strlen($data);
+
+        if (null === $len) {
+            return;
+        }
+        if ($len % 2) {
+            trigger_error('hex2bin(): Hexadecimal input string must have an even length', E_USER_WARNING);
+
+            return false;
+        }
+
+        return pack('H*', $data);
+    }
+}