php如何读取数据库转json数据[vc keyong]

include("../../db/conn.php");//数据库连接；

echo "<pre>";

//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);

//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);

$sql = "select salesid,fromstore,fromsaler,salestime,salenum,totalprice from midea_sales";

$results = mysqli_query($con, $sql);

$rows = mysqli_fetch_all($results);

$rows = str_replace('[', '{', json_encode($rows));

$rows = str_replace(']', '}', $rows);

echo json_encode($rows);