使用php从json字符串/数组插入mysql中的多行？

"i am trying to develop an script which allows me to insert multiple rows from an jsonarray in mysql database, but upon testing only one rows is being inserted and here is my code:

<?php 
    $con = mysqli_connect($host,$user,$password,$database) or die('Unable to Connect');
     if($_SERVER["REQUEST_METHOD"]=="POST")
     {
         $jsonData=file_get_contents("sampledata.json");
         $jsonString=json_decode($jsonData,true);
         foreach($jsonString['Order Summary'] as $cart)
         {
             $name=$cart['ProductName'];
             $price=$cart['ProductPrice'];
             $quantity=$cart['ProductQuantity'];
             $cost=$cart['ProductCost'];
             $seller=$cart['SellerId'];
             $stmt=$con->prepare("INSERT INTO sProducts(Name,Price,Quantity,Cost,Sellerid)VALUES(?,?,?,?,?)");
             $stmt->bind_param("sssss",$name,$price,$quantity,$cost,$seller);
             if($stmt->execute())
              return json_encode("data inserted");
            return json_encode("error");     
         } 
     }

can anyone tell me where is the mistake or could guide me into this direction ?

For one, you are reutrning in the first iteration of the loop - which means that the script stops. return should only be used to return from a function.

If you remove both returns, that will make the loop continue until its done.

And you should not prepare the query inside the loop, its not needed - and much more efficient to prepare it before you start looping (it can be used multiple times with different values when you bind and execute in a loop). I've also added some spaces in the code to make it easier to read

$con = mysqli_connect($host,$user,$password,$database) or die('Unable to Connect');
$msg = "data inserted";

if ($_SERVER["REQUEST_METHOD"]=="POST") {
    $jsonData = file_get_contents("sampledata.json");
    $jsonString = json_decode($jsonData,true);
    $stmt = $con->prepare("INSERT INTO sProducts (Name, Price, Quantity, Cost, Sellerid) VALUES (?, ?, ?, ?, ?)");

    foreach($jsonString['Order Summary'] as $cart) {
        $name = $cart['ProductName'];
        $price = $cart['ProductPrice'];
        $quantity = $cart['ProductQuantity'];
        $cost = $cart['ProductCost'];
        $seller = $cart['SellerId'];
        $stmt->bind_param("sssss", $name, $price, $quantity, $cost, $seller);
        if (!$stmt->execute())
            $msg = "Something went wrong";
    } 
}
return json_encode($msg);