Register the necessary callbacks
$hooksWpOrgRequestsHooksrequired
public function register(Hooks $hooks) {
$hooks->register('curl.before_send', [$this, 'curl_before_send']);
$hooks->register('fsockopen.after_headers', [$this, 'fsockopen_header']);
}
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https://developer.wordpress.org/reference/classes/wporg-requests-auth-basic/register