Can't Parse webhook of razropay - php

Question

The webhook pings successfully, but I'm unable to parse it, I spent 4 hours still no luck, I tried all methods but still failed,I just don't know why is this happening , i have used it same for stripe webhook, it works but this is working for razor pay
Below is the header and response I receive on my webhook:
Source: https://webhook.site/
Headers
connection close
accept-encoding gzip
x-razorpay-signature f0087994b59ee5ec1b1828a87f794c89bb398033a428bb79971875e5f295322e
x-razorpay-event-id Gb5kMCdcAZ8jJ8
request-id Gb5kMCdcAZ8jJ8
content-type application/json
content-length 1053
user-agent Razorpay-Webhook/v1
host webhook.site
Raw content
{
"entity": "event",
"account_id": "acc_DOXUp08NQX6Sr9",
"event": "payment.captured",
"contains": [
"payment"
],
"payload": {
"payment": {
"entity": {
"id": "pay_Gb5kLMBMjON6So",
"entity": "payment",
"amount": 1132,
"currency": "USD",
"base_amount": 82174,
"base_currency": "INR",
"status": "captured",
"order_id": "order_Gb5kEv5w8pveU5",
"invoice_id": null,
"international": false,
"method": "card",
"amount_refunded": 0,
"refund_status": null,
"captured": true,
"description": null,
"card_id": "card_Gb5kLUZEfKlXF4",
"card": {
"id": "card_Gb5kLUZEfKlXF4",
"entity": "card",
"name": "231231231231231231",
"last4": "8826",
"network": "Visa",
"type": "prepaid",
"issuer": "SBIN",
"international": false,
"emi": false,
"sub_type": "business"
},
"bank": null,
"wallet": null,
"vpa": null,
"email": "niteshkmr366#gmail.com",
"contact": "[phone]",
"notes": {
"ytsubme_account_email": "niteshkmr366#gmail.com",
"phone": "8169179450"
},
"fee": 1644,
"tax": 0,
"error_code": null,
"error_description": null,
"error_source": null,
"error_step": null,
"error_reason": null,
"acquirer_data": {
"auth_code": null
},
"created_at": 1613226609
}
}
},
"created_at": 1613226609
}
My PHP Code:
<?
$data = file_get_contents('php://input');
$obj = json_decode($data);
file_put_contents('data.txt',$data);
//data.txt file is still empty
?>

Answer 1

Thanks to #IMSoP,
For reminding me to sort out why it's empty before you worry about parsing it.
My webhook was pinging to the URL where login was necessity,
)more info : SESSIONS : i.e. if session wasn't set it was redirecting them to / page.)
Due to which I was getting empty data ,feeling so dumb about this.