php如何传数组

$array = array("name" => "小明", "age" => 18, "gender" => "男");
$query_str = Http_build_query($array);

name=%E5%B0%8F%E6%98%8E&age=18&gender=%E7%94%B7

$url = "result.php?" . $query_str;
header("Location: $url");

if(isset($_GET["name"]) && isset($_GET["age"]) && isset($_GET["gender"])) {
    $name = $_GET["name"];
    $age = $_GET["age"];
    $gender = $_GET["gender"];
    $array = array("name" => urldecode($name), "age" => $age, "gender" => urldecode($gender));
}

$array = array("name" => "小明", "age" => 18, "gender" => "男");

$post_data = array("data" => json_encode($array));
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://example.com/result.php");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);

if(isset($_POST["data"])) {
    $json_str = $_POST["data"];
    $array = json_decode($json_str, true);
}

$array = array("name" => "小明", "age" => 18, "gender" => "男");

session_start();
$_SESSION["my_array"] = $array;

session_start();
$array = $_SESSION["my_array"];