wp-includes/class-wp-query.php:1874Sets the value of a query variable.
$query_varstring$valuemixed public function set( $query_var, $value ) { $this->query_vars[ $query_var ] = $value; }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/class-wp-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.