gistfile1.php

<?php
function example_image_widget_output( $output, $args, $instance, $id_base ) {
	$link_open = '';
	$link_close = '';
	if ( ! empty ( $instance['link'] ) ) {
		$target = ( empty( $instance['new_window'] ) ) ? '' : ' target="_blank"';
		$link_open = '<a href="' . esc_url( $instance['link'] ) . '"' . $target . '>';
		$link_close = '</a>';
	}
				
	// Add the image.
	if ( ! empty( $instance['image_id'] ) ) {
		$image_size = ( empty( $instance['image_size'] ) ) ? 'medium' : $instance['image_size'];
		
		$output .= sprintf( '<p>%s%s%s</p>',
			$link_open,
			wp_get_attachment_image( $instance['image_id'], $image_size ),
			$link_close
		);
	}
	
	$output = ( empty( $instance['title'] ) ) ? '' : $args['before_title']. $instance['title'] . $args['after_title'];
	
	// Add the text.
	if ( ! empty( $instance['text'] ) ) {
		$output .= apply_filters( 'the_content', $instance['text'] );
	}
	
	// Add a more link.
	if ( ! empty( $link_open ) && ! empty( $instance['link_text'] ) ) {
		$output .= '<p class="more">' . $link_open . $instance['link_text'] . $link_close . '</p>';
	}
	
	return $output;
}
add_filter( 'simple_image_widget_output', 'example_image_widget_output', 10, 4 );