如何使用curl php更改此格式

<?php
    // 引入curl库
    $ch = curl_init();
?>

<?php
    // 设置URL
    curl_setopt($ch, CURLOPT_URL, "http://example.com");

    // 设置请求方法为POST
    curl_setopt($ch, CURLOPT_POST, true);

    // 设置请求头
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Authorization: Bearer token'
    ));

    // 设置请求体
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(array(
        'key1' => 'value1',
        'key2' => 'value2'
    )));
?>

<?php
    // 发送请求
    $response = curl_exec($ch);

    // 获取响应信息
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
?>

<?php
    // 处理响应结果
    if ($httpCode == 200 && strpos($contentType, 'application/json') !== false) {
        $responseData = json_decode($response, true);
        // 进行进一步处理
    }
?>