php CURL怎么提交数组+json

研究了3天了,有个接口，需要提交格式如下：
name: "test",
password: "test",
{
"orderInfo":{
"title":"test",
},
"orderReceipt":{
"title":"test",
},
"title":"test"
}
我直接post这个字符串不行，但我post数组可以验证name和password,但json信息无法验证，如下：
Array
(
[name] => test
[password] => test
[0] => {
"orderInfo":{
"title":"test",
},
"orderReceipt":{
"title":"test",
},
"title":"test"
}
)

参考PHP手册选项CURLOPT_POSTFIELDS：https://www.php.net/manual/zh/function.curl-setopt.php
使用Guzzle请求，参考Guzzle文档：https://guzzle-cn.readthedocs.io/zh_CN/latest/quickstart.html#id9

public function curlHttpPost($url, $data, $header = [])
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
$sResult = curl_exec($ch);
curl_close($ch);
return $sResult;

}

function post_data($url,$data) {
    //* 来源 https://www.bz80.vip
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POSTFIELDS,  $data);
      curl_setopt($ch, CURLOPT_TIMEOUT, 5);
    curl_setopt($ch, CURLOPT_REFERER, 'https://www.bz80.com');
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (iPad; CPU OS 11_0 like Mac OS X) AppleWebKit/604.1.34 (KHTML, like Gecko) Version/11.0 Mobile/15A5341f Safari/604.1');
                
    curl_setopt($ch, CURLOPT_HTTPHEADER,
        array(
            'Content-Type: application/json; charset=utf-8',
            'Content-Length:' . strlen($data)
    );
    ob_start();
    curl_exec($ch);
    $return_content = ob_get_contents();
    ob_end_clean();
    $return_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    return $return_content;
}