class.ilPageUtil.php

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<?php

class ilPageUtil
{
    public static function _existsAndNotEmpty(
        string $a_parent_type,
        int $a_id,
        string $a_lang = "-"
    ): bool {
        global $DIC;

        $ilDB = $DIC->database();

        // language must be set at least to "-"
        if ($a_lang == "") {
            $a_lang = "-";
        }
        $and_lang = " AND lang = " . $ilDB->quote($a_lang, "text");

        $query = "SELECT page_id, is_empty FROM page_object WHERE page_id = " . $ilDB->quote($a_id, "integer") . " " .
            "AND parent_type= " . $ilDB->quote($a_parent_type, "text") . $and_lang;

        $set = $ilDB->query($query);
        if ($row = $ilDB->fetchAssoc($set)) {
            if ($row["is_empty"] != 1) {
                return true;
            }
        }
        return false;
    }
}