WP_Roles::add_cap( string $role, string $cap, bool $grant = true )

Adds a capability to role.


$role string Required
Role name.
$cap string Required
Capability name.
$grant bool Optional
Whether role is capable of performing capability.

Default: true

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More Information

Changing the capabilities of a role is persistent, meaning the added capability will stay in effect until explicitly revoked.

This setting is saved to the database (in table wp_options, field wp_user_roles), so it might be better to run this on theme/plugin activation.

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File: wp-includes/class-wp-roles.php. View all references

public function add_cap( $role, $cap, $grant = true ) {
	if ( ! isset( $this->roles[ $role ] ) ) {

	$this->roles[ $role ]['capabilities'][ $cap ] = $grant;
	if ( $this->use_db ) {
		update_option( $this->role_key, $this->roles );

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Version Description
2.0.0 Introduced.

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