wp-includes/class-wp-user.php:710Adds capability and grant or deny access to capability.
$capstring$grantbooloptionaltrue public function add_cap( $cap, $grant = true ) { $this->caps[ $cap ] = $grant; update_user_meta( $this->ID, $this->cap_key, $this->caps ); $this->get_role_caps(); $this->update_user_level_from_caps(); }Introduced in 2.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-user.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.