如何将mysql所有表转换为json（如何选择多个表，而不是一个）;
我试图选择我的db的多个表：然后将其从mysql转换为json格式请指导我！
<body>
<?php
$connect = mysqli_connect("localhost", "root", "", "martlink_db");
$sql = "SELECT * FROM users";
$result = mysqli_query($connect, $sql);
$json_array = array();
while($row = mysqli_fetch_assoc($result))
{
$json_array[] = $row;
}
echo '<pre>';
print_r(json_encode($json_array));
echo '</pre>';
//echo json_encode($json_array);
?>
</body>
检查以下查询
<?php
$connect = mysqli_connect("localhost", "root", "", "martlink_db");
$sql ="SELECT * FROM table1 t1,table2 t2 where condition"
$stmt = $conn->query($sql);
$jsonArr = array();
do
{
$rowset = $stmt->fetchAll(PDO::FETCH_NUM);
if ($rowset)
{
$jsonArr[] = tojson($rowset, $i);
}
}while ($stmt->nextRowset());
?>