Register the necessary callbacks
(Requests_Hooks) (Required) Hook system
File: wp-includes/Requests/Auth/Basic.php
public function register(Requests_Hooks &$hooks) { $hooks->register('curl.before_send', array(&$this, 'curl_before_send')); $hooks->register('fsockopen.after_headers', array(&$this, 'fsockopen_header')); }
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https://developer.wordpress.org/reference/classes/requests_auth_basic/register