如何在php mysql中获取结果的所有行？

在我的表中我有 2 条记录companyid = 1，但是当我运行下面的 php 时companyid = 1它只返回第一个！
如何获取所有记录？

php 文件：

if (isset($_GET["companyid"])) {
$companyid = $_GET['companyid'];

// get a product from products table
$result = mysql_query("SELECT * FROM `products`         
                        WHERE companyid = $companyid;");

if (!empty($result)) {      

    if (mysql_num_rows($result) > 0) {

   while($row = mysql_fetch_assoc($result)){
      $product = array();
      $product["pid"] = $row["pid"];
      $product["productname"] = $row["productname"];        
    }

   $response["product"] = array();

       array_push($response["product"], $product);

        // success
       $response["success"] = 1;

   echo json_encode($response);

    } else {
        // no product found
        $response["success"] = 0;
        $response["message"] = "No product found";

        // echo no product JSON
        echo json_encode($response);
    }
} else {
    // no product found
    $response["success"] = 0;
    $response["message"] = "No product found";

    // echo no users JSON
    echo json_encode($response);
}
} else {
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";

// echoing JSON response
echo json_encode($response);
}

Using mysql_fetch_array正在发生同样的事情。 它返回{"product":[{"pid":"12371","productname":"test"}],"success":1}当我运行不带参数的查询时select * from table using mysql_fetch_array它返回所有行..

正如 NikiC 指出的那样，您不应该再使用 mysql_ 函数，您可以在 PDO 和 mysqli 中获取整个数组，这是一个使用mysqli->fetch_all http://www.php.net/manual/en/mysqli-result.fetch-all.php功能，希望对您有帮助！

//Database Connection
$sqlConn =  new mysqli($hostname, $username, $password, $database);

//Build SQL String
$sqlString = "SELECT * FROM my_table";

//Execute the query and put data into a result
$result = $sqlConn->query($sqlString);

//Copy result into a associative array
$resultArray = $result->fetch_all(MYSQLI_ASSOC);

//Copy result into a numeric array
$resultArray = $result->fetch_all(MYSQLI_NUM);

//Copy result into both a associative and numeric array
$resultArray = $result->fetch_all(MYSQLI_BOTH);