PHPでデータベースを読み取り、JSONデータを変換する方法

include("../../db/conn.php");//数据库连接； echo "
"; //数据库读取后，直接转换为数组显示; $sql = "select salesid,fromstore,fromsaler,salestime,salenum,totalprice from midea_sales WHERE salesid=44"; $results = mysqli_query($con, $sql); $rows = mysqli_fetch_assoc($results); foreach ($rows as $key => $v) { $res[$key] = $v; } echo json_encode($res);
        

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//数据库读取后，直接转换为数组显示; $sql = "select salesid,fromstore,fromsaler,salestime,salenum,totalprice from midea_sales"; $results = mysqli_query($con, $sql); $data = array();//初始化数组; class Alteration { public $fromstore; public $fromsaler; public $salenum; public $totalprice; } while ($row = mysqli_fetch_assoc($results)) { $alter = new Alteration();//实例化对象; $alter->fromstore = $row['fromstore']; $alter->fromsaler = $row['fromsaler']; $alter->salenum = $row['salenum']; $alter->totalprice = $row['totalprice']; $data[] = $alter; } echo json_encode($data);

$sql = "select salesid,fromstore,fromsaler,salestime,salenum,totalprice from midea_sales"; $results = mysqli_query($con, $sql); while ($rows = mysqli_fetch_assoc($results)) { $res[] = $rows; } //$res = str_replace('[', '{', json_encode($res)); //$res = str_replace(']', '}', $res); print_r($res);

$sql = "select salesid,fromstore,fromsaler,salestime,salenum,totalprice from midea_sales"; $results = mysqli_query($con, $sql); $rows = mysqli_fetch_all($results); print_r($rows);