Payment Notify Verify is 0

[sidealice]

We use alipay global's public key:(sandbox)
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtOcJhqk3mKhcGC0ARNjdFoZtYGEhfcgrUEUe9CF+sDzIJZMMVypRY67GoDQEdZTmHBPnVtsBRKNGSq4/h8r4BZ3XNE81K8CqwX0YzwqEvd0qlhyn9KzGCQF3Ps9wQRkPKdFzvmYcrW4WXmMOVMDg+XxuzNpXygqpxOJ++7Dpi8E6Ste0/ZtrJ2ACLIZVKCh951Cko25ePd2QyJpXq1g2jyWMRQVIapPp+t+UHG/4affBYI5GNREsxcXukg+SeymMlR2TwZvbyGYMlEb34icznLeD4jdkXOnU3pmkxYg2FmVCg0YujqrUL6yjQ648WkGruKFAyMkXC9inj9eZJwn8eQIDAQAB

And the notify verification is always 0.
Could you help to figure out the verify testing use case and we can check if code is correct?

e.g.

<?php

function verify($httpMethod, $path, $clientId, $rspTime, $rspBody, $signature, $alipayPublicKey)
{
    $rspContent = genSignContent($httpMethod, $path, $clientId, $rspTime, $rspBody);
    return verifySignatureWithSHA256RSA($rspContent, $signature, $alipayPublicKey);
}

function genSignContent($httpMethod, $path, $clientId, $timeString, $content)
{
    $payload = $httpMethod . " " . $path . "\n" . $clientId . "." . $timeString . "." . $content;
    return $payload;
}
function verifySignatureWithSHA256RSA($rspContent, $rspSignValue, $alipayPublicKey)
{
    $pubKey = "-----BEGIN PUBLIC KEY-----\n" .
        wordwrap($alipayPublicKey, 64, "\n", true) .
        "\n-----END PUBLIC KEY-----";
    if (
        strstr($rspSignValue, "=")
        || strstr($rspSignValue, "+")
        || strstr($rspSignValue, "/")
        || $rspSignValue == base64_encode(base64_decode($rspSignValue))
    ) {
        $originalRspSignValue = base64_decode($rspSignValue);
    } else {
        $originalRspSignValue = base64_decode(urldecode($rspSignValue));
    }
    $verifyResult = openssl_verify($rspContent, $originalRspSignValue, $pubKey, OPENSSL_ALGO_SHA256);
    return $verifyResult;
}
$httpMethod = "POST";
$path = "";
$clientId = "SANDBOX_5Y606G2YJPQB00270";
$rspTime = "2022-04-26T04:39:22Z";

$signature = "bc6MuaBUCbIgxG6fbGh6MHJP%2FqiI6lrosdnN8mEEunDRR3k5j8cjRbGI8fAeE%2Bibhu%2FN4JxjGGCY7c%2B%2FTM8kUdv8nTdHU2MERsBn3mRcFe4eBW%2BxtFLL2brYaKSc%2Bb3mwIA0icHoUpwirVbfl9RrUviMsEJtSFW14rzKVjqBvwNo4iqzkh%2B2UIjzx%2FI7pbrSinZcJNZdjmMRRReQAMsYcrGGrzR%2BPtUjS%2FwNtA8NVHHk2LUeTuwtDVt%2F2ZxrsVm6C%2FufIZ3dz4yInSoR6fRms2%2FP67lb9PSTq0LGNM9EcXhtb3gCWmfdPPrUUuqxuBgDFno7%2F2%2BaPcht3GKP%2FPNrAg%3D%3D";
$alipayPublicKey = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAi1ltikGrnsmknSD/OYNQSMw485C/OF7Y9MVxHIDkbIWZm8JC9cuhdZbduTmx2AKeDmkYK73dbF1xZnZQGd38sSKAkiWOSbz15a0bfd/XMlcx5ICqjkWi6gMWYOgUBp1RLuHvisjicwb4fBIN7IPySGMvSFFgPspUUc6gY3HKJgP59KAUJR1WA7B7tPw0C/xhcRFKln0nsU7wzk7R4HhYzKua0BxV6mYYDxGbVepH5tJ5ZzSNVR3IGJRQc6c7+gU1F6z5Jc3V4NT7EHOmu7T888A+Uhec+4XymTVNkRZ+u6ZEj03oMwtv7NcQf2z8Kcp1/VeyOg7toXoQjNtH2oEIWQIDAQAB";
$rspBody = '{
    "notifyType": "PAYMENT_RESULT",
    "result": {
        "resultCode": "SUCCESS",
        "resultStatus": "S",
        "resultMessage": "success"
    },
    "paymentRequestId": "20200101234567890444",
    "paymentId": "20200101234567890132",
    "paymentAmount": {
        "value": "8000",
        "currency": "EUR"
    },
    "actualPaymentAmount": {
        "value": "8000",
        "currency": "EUR"
    },
    "paymentCreateTime": "2020-01-01T12:01:00+08:30",
    "paymentTime": "2020-01-01T12:01:01+08:30"
}';
echo (int) verify($httpMethod, $path, $clientId, $rspTime, $rspBody, $signature, $alipayPublicKey);

the above data is from alipay global's inotify testing data.
All fields is copied at alipay's console except path field, according to the API document notify need to fill the path filed. Could you help me to check if path is needed and how to fill this field when we verify the notification from the payment transaction(async) .