postExpired/_prepend.php

<?php
/**
 * @brief postExpired, a plugin for Dotclear 2
 *
 * @package Dotclear
 * @subpackage Plugin
 *
 * @author Jean-Christian Denis and Contributors
 *
 * @copyright Jean-Christian Denis
 * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
 */
if (!defined('DC_RC_PATH')) {
    return null;
}

/**
 * Encode Expired Date settings
 *
 * This is saved into post_meta as meta_id value,
 * so this must be less than 255 caracters.
 *
 * @param  array  $in Array of options
 * @return string     "Serialized" options
 */
function encodePostExpired($in)
{
    $out = [];
    foreach ($in as $k => $v) {
        $out[] = $k . '|' . $v;
    }

    return implode(';', $out);
}

/**
 * Decode Expired Date settings
 *
 * @param  string $in "Serialized" options
 * @return array      Array of options
 */
function decodePostExpired($in)
{
    $out = [];
    foreach (explode(';', $in) as $v) {
        $v          = explode('|', $v);
        $out[$v[0]] = $v[1];
    }

    return $out;
}