wp-includes/rest-api/class-wp-rest-server.php:1966string public static function get_raw_data() { // phpcs:disable PHPCompatibility.Variables.RemovedPredefinedGlobalVariables.http_raw_post_dataDeprecatedRemoved global $HTTP_RAW_POST_DATA; // $HTTP_RAW_POST_DATA was deprecated in PHP 5.6 and removed in PHP 7.0. if ( ! isset( $HTTP_RAW_POST_DATA ) ) { $HTTP_RAW_POST_DATA = file_get_contents( 'php://input' ); } return $HTTP_RAW_POST_DATA; // phpcs:enable }Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/class-wp-rest-server.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.