wp-includes/PHPMailer/PHPMailer.php:5173Set the public and private key files and password for S/MIME signing.
$cert_filenamestring$key_filenamestring$key_passstring$extracerts_filenamestringoptional'' public function sign($cert_filename, $key_filename, $key_pass, $extracerts_filename = '') { $this->sign_cert_file = $cert_filename; $this->sign_key_file = $key_filename; $this->sign_key_pass = $key_pass; $this->sign_extracerts_file = $extracerts_filename; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/PHPMailer/PHPMailer.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.