<?php
    $area_id = trim($_POST['area_id']);//城市id
    $sql = "SELECT
                id,
                area_name
            FROM
                base_area
            WHERE
                parent_id = " . $area_id;
    writeLog("select base_area:" . $sql);
    $result = $pdo->query($sql);
    $area_array = $result->fetchAll(PDO::FETCH_ASSOC);
    $json['code'] = '0';
    $json['info'] = '返回数据成功';
    $json['list'] = $area_array;
    $json['count'] = (string)count($area_array);
    echo json_encode($json);
    exit();
?>