Determines whether the site has a custom logo.

Parameters

$blog_idintoptional

ID of the blog in question. Default is the ID of the current blog.

Return

Source

function has_custom_logo( $blog_id = 0 ) {
	$switched_blog = false;

	if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
		switch_to_blog( $blog_id );
		$switched_blog = true;
	}

	$custom_logo_id = get_theme_mod( 'custom_logo' );
	$is_image       = ( $custom_logo_id ) ? wp_attachment_is_image( $custom_logo_id ) : false;

	if ( $switched_blog ) {
		restore_current_blog();
	}

	return $is_image;
}

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