wp-includes/PHPMailer/POP3.php:434Add an error to the internal error store.
$errorstring protected function setError($error) { $this->errors[] = $error; if ($this->do_debug >= self::DEBUG_SERVER) { echo '<pre>'; foreach ($this->errors as $e) { print_r($e); } echo '</pre>'; } }Unchanged from 6.9.7 through 7.1.0.
Signature, return type and hooks compared across 3 parsed releases.
src/wp-includes/PHPMailer/POP3.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.