select statement retourneert altijd de laatst ingevoegde rij in php mysql

        if (mysql_num_rows($result) > 0) {
        $result = mysql_fetch_array($result);

        $product = array();
        $product["name"] = $result["name"];
        $product["unit"] = $result["unit"];
        $product["calory"] = $result["calory"];
        $product["carbohydrate"] = $result["carbohydrate"];
        $product["category"] = $result["category"];


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

        // user node
        $response["product"] = array();

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

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

vervang dit door

while(mysql_num_rows($result) > 0 && ($result = mysql_fetch_array($result))) {

        $product = array();
        $product["name"] = $result["name"];
        $product["unit"] = $result["unit"];
        $product["calory"] = $result["calory"];
        $product["carbohydrate"] = $result["carbohydrate"];
        $product["category"] = $result["category"];


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

        // user node
        $response["product"] = array();

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

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

het resultaat is array en je loopt er niet doorheen, dus het geeft maar één element in de array