wp-includes/IXR/class-IXR-base64.php:9$datapublicclass IXR_Base64{ var $data; /** * PHP5 constructor. */ function __construct( $data ) { $this->data = $data; } /** * PHP4 constructor. */ public function IXR_Base64( $data ) { self::__construct( $data ); } function getXml() { return '<base64>'.base64_encode($this->data).'</base64>'; }}Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/IXR/class-IXR-base64.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.