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diff --git a/string_array.php b/string_array.php
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+<?php
+
+#  Copyright (C) 2007 Jason Woofenden
+#
+#  This file is part of wfpl.
+#
+#  wfpl is free software; you can redistribute it and/or modify it under the
+#  terms of the GNU Lesser General Public License as published by the Free
+#  Software Foundation; either version 2.1 of the License, or (at your option)
+#  any later version.
+#
+#  wfpl is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
+#  more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with wfpl; if not, write to the Free Software Foundation, Inc., 51
+#  Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+# This file contains code to convert an array into a string, and back again.
+
+require_once('code/wfpl/binary.php');
+
+function string_to_array($data) {
+	$header_count = pop_int($data);
+	$out = array();
+	while($header_count--) {
+		$size = pop_int($data);
+		$out[] = substr($data, 0, $size);
+		$data = substr($data, $size);
+	}
+	return $out;
+}
+
+function array_to_string($array) {
+	$ret = to_raw_int(count($array));
+	foreach($array as $element) {
+		$ret .= to_raw_int(strlen($element));
+		$ret .= $element;
+	}
+	return $ret;
+}
+
+?>