How can the issue of missing cookies when redirecting users after login be resolved in a cURL script?

Issue: When redirecting users after login in a cURL script, the cookies set during the login process may not be carried over to the redirected page, resulting in missing cookies. Solution: To resolve this issue, you can manually set the cookies in the cURL request headers before making the redirect request. 

<?php
$loginUrl = 'https://example.com/login';
$redirectUrl = 'https://example.com/redirect';

$ch = curl_init();

// Login request
curl_setopt($ch, CURLOPT_URL, $loginUrl);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, 'username=myusername&password=mypassword');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Execute login request
$response = curl_exec($ch);

// Set cookies in headers for redirect request
$cookies = [];
preg_match_all('/^Set-Cookie:\s*([^;]*)/mi', $response, $matches);
foreach ($matches[1] as $match) {
    parse_str($match, $cookie);
    $cookies[] = $cookie;
}

$cookieString = '';
foreach ($cookies as $cookie) {
    foreach ($cookie as $key => $value) {
        $cookieString .= $key . '=' . $value . '; ';
    }
}

// Redirect request with cookies
curl_setopt($ch, CURLOPT_URL, $redirectUrl);
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Cookie: ' . $cookieString]);

// Execute redirect request
$response = curl_exec($ch);

// Close cURL session
curl_close($ch);

echo $response;
?>

Keywords

PHP cURL cookies redirect login

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