Returns whether a particular user has the specified capability for a given site.

Description

This function also accepts an ID of an object to check against if the capability is a meta capability. Meta capabilities such as edit_post and edit_user are capabilities used by the map_meta_cap() function to map to primitive capabilities that a user or role has, such as edit_posts and edit_others_posts.

Example usage:

user_can_for_site( $user->ID, $site_id, 'edit_posts' );
user_can_for_site( $user->ID, $site_id, 'edit_post', $post->ID );
user_can_for_site( $user->ID, $site_id, 'edit_post_meta', $post->ID, $meta_key );

Parameters

$userint|WP_Userrequired

User ID or object.

$site_idintrequired

Site ID.

$capabilitystringrequired

Capability name.

$argsmixedoptional

Optional further parameters, typically starting with an object ID.

Return

Source

function user_can_for_site( $user, $site_id, $capability, ...$args ) {
	if ( ! is_object( $user ) ) {
		$user = get_userdata( $user );
	}

	if ( empty( $user ) ) {
		// User is logged out, create anonymous user object.
		$user = new WP_User( 0 );
		$user->init( new stdClass() );
	}

	// Check if the blog ID is valid.
	if ( ! is_numeric( $site_id ) || $site_id <= 0 ) {
		return false;
	}

	$switched = is_multisite() ? switch_to_blog( $site_id ) : false;

	$can = user_can( $user->ID, $capability, ...$args );

	if ( $switched ) {
		restore_current_blog();
	}

	return $can;
}

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