WordPressDashboardWidget.php

<?php  
// Misc Functions

// Function that outputs the contents of the dashboard widget
function dash_widget( $post, $callback_args ) {
	$posts_array = get_posts(
		array(	
			'post_type'         => 'post',
			'orderby' => 'post_date',
			'posts_per_page' => -1
		)
	);    

    foreach ($posts_array as $post) {

    	$id = $post->ID;
    	$title = $post->post_title;
    	$meta = get_post_meta($id);
    	$custom = $meta['custom_meta'][0];
		
		echo "<pre>";
		print_r($posts_array);
    	echo "</pre>";
    }
}

// Function used in the action hook
function add_dashboard_widget_action() {
	wp_add_dashboard_widget('dashboard_widget', 'Example Dashboard Widget', 'dash_widget');
}

// Register the new dashboard widget with the 'wp_dashboard_setup' action
add_action('wp_dashboard_setup', 'add_dashboard_widget_action' );


?>