php - How to get Referrer value using CURLINFO or cURL - Stack Overflow

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How to get Referrer value from cURL URL? I am trying something like this but not working.

$curldomain = "/";

$ch = curl_init($curldomain);

// Set cURL options
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);

$referrerValue = curl_getinfo($ch, CURLINFO_REFERER);

How to get Referrer value from cURL URL? I am trying something like this but not working.

$curldomain = "https://www.example/";

$ch = curl_init($curldomain);

// Set cURL options
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);

$referrerValue = curl_getinfo($ch, CURLINFO_REFERER);

• php
• curl
• http-headers
• php-curl
• referrer

Share Improve this question Follow asked Mar 22 at 12:06 JK SandhiyaJK Sandhiya 18333 silver badges1313 bronze badges 2

• 1 I’m not clear on what you are trying to do. The referrer header is a request header, not a response header, so you would set it and send to the server, it isn’t going to send one back to you. – Chris Haas Commented Mar 23 at 3:08
• @ChrisHaas check curl.se/libcurl/c/CURLOPT_AUTOREFERER.html (or just skim my answer) – hanshenrik Commented Mar 23 at 21:03

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1 Answer 1

Sorted by: Reset to default 1

Your extraction code is correct,

$referrerValue = curl_getinfo($ch, CURLINFO_REFERER);

is the correct way to fetch the last referer header sent by curl.

Curl does not track referer automatically, it is opt-in, you have to run

curl_setopt($ch, CURLOPT_AUTOREFERER, true);

to opt-in to referer-tracking, and even then, there will only be a referer if your curl code actually set CURLOPT_FOLLOWLOCATION and follows a redirect, or you manually inject a referer with CURLOPT_REFERER.

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