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

Assign role a capability.

Contents

Parameters

$cap string Required
Capability name.
$grant bool Optional
Whether role has capability privilege.

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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Source

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

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

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Changelog

Changelog
Version Description
2.0.0 Introduced.

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User Contributed Notes

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    Contributed by Codex —

    Example

    function add_theme_caps() {
	// gets the author role
	$role = get_role( 'author' );

	// This only works, because it accesses the class instance.
	// would allow the author to edit others' posts for current theme only
	$role->add_cap( 'edit_others_posts' ); 
}
add_action( 'admin_init', 'add_theme_caps');

    NB: This setting is saved to the database, so it might be better to run this on theme/plugin activation

    function add_theme_caps(){
	 global $pagenow;

	 if ( 'themes.php' == $pagenow && isset( $_GET['activated'] ) ){ // Test if theme is active
		 // Theme is active
		 // gets the author role
		 $role = get_role( 'author' );

		 // This only works, because it accesses the class instance.
		 // would allow the author to edit others' posts for current theme only
		 $role->add_cap( 'edit_others_posts' ); 
	 } else {
		 // Theme is deactivated
		 // Remove the capacity when theme is deactivate
		 $role->remove_cap( 'edit_others_posts' ); 
	 }
}
add_action( 'load-themes.php', 'add_theme_caps' );

    To add capability to specific user :

    $user = new WP_User( $user_id );
$user->add_cap( 'can_edit_posts' );

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