Assign role a capability.

Parameters

$capstringrequired

Capability name.

$grantbooloptional

Whether role has capability privilege.

Default:true

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.

Source

public function add_cap( $cap, $grant = true ) {
	$this->capabilities[ $cap ] = $grant;
	wp_roles()->add_cap( $this->name, $cap, $grant );
}

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