function update($table, $data, $id_field, $id_value) {
    foreach ($data as $field => $value) {
        $fields[] = sprintf("`%s` = '%s'", $field, addslashes($value));
    }
    $field_list = join(',', $fields);
    $query = sprintf("UPDATE `%s` SET %s WHERE `%s` = %s", $table, $field_list, $id_field, intval($id_value));
    return $query;
}

function insert($table, $data) {
    foreach ($data as $field => $value) {
        $fields[] = sprintf("`%s` = '%s'", $field, addslashes($value));
    }
    $field_list = join(',', $fields);
    $query = sprintf("INSERT INTO `%s` SET %s", $table, $field_list);
    return $query;
}


query(insert(“meeting”, $post), $db);

query(update(“meeting”, $post, “id”, $post[“id”]), $db);

query(“DELETE FROM meeting WHERE id=”.$post[“id”])