Easily add custom post types, with custom fields, in Wordpress

custom_post_type_scaffold.php

<?php
/*

////////////////////////////////////////////////////////////
//////
////// 		Abstracted code for quickly adding custom post types
////// 		include this file in functions.php, then add custom post types like so:
//////
////////////////////////////////////////////////////////////


	$custom_post_types = array(
		'production' => array(
			'options' => 
				array(
					'labels' => array(
						'name' => __( 'Productions' ),
						'singular_name' => __( 'Production' )
					),
				'supports' => array('title','author','editor','thumbnail','excerpt','revisions'),
				'public' => true,
				'has_archive' => true,
				),
			'custom_fields' => array(
				'buy_tickets' => 		array('label'=>'Buy Tickets'),
				'buy_tickets_link' => 	array('label' => 'Buy Ticket Link'),
				'learn_more' => 		array('label'=> 'Learn More'),
				'learn_more_link' => 	array('label' => 'Learn More Link')
			
			)
		
		)
	);

*/

add_action( 'init', 'create_custom_post_types' );
function create_custom_post_types() {
	global $custom_post_types;
	foreach($custom_post_types as $name=>$custom_post_type)
	{
		register_post_type( $name,$custom_post_type['options']);
	}
}

add_action('admin_init','meta_init_add_boxes');

function meta_init_add_boxes() {
	global $custom_post_types;
	
	foreach($custom_post_types as $name=>$custom_post_type)
	{
		add_meta_box(
		  $name.'_meta',
		  'Custom Fields',
		  'post_type_meta',
		  $name,
		  'advanced',
		  'high'
		);
	}
}

//error_reporting(E_ALL);
function post_type_meta() {
  	global $post;
	global $custom_post_types;
	$post_type = $custom_post_types[$post->post_type];
	$custom_fields = $post_type['custom_fields'];
	$fields = array();

	foreach($custom_fields as $field=>$field_info) {
		$fields[$field] = $field_info;
		$fields[$field]['value'] = get_post_meta($post->ID,$field,TRUE);
	}
	//Call the write panel HTML
	?>
	<style type="text/css" media="screen">
		.meta_panel .description {
		  display: none;
		}
		.meta_panel label {
		  display: block;
		  font-weight: bold;
		  margin: 6px;
		  margin-bottom: 0;
		  margin-top: 12px;
		}
		.meta_panel label span {
		  display: inline;
		  font-weight: normal;
		}
		.meta_panel span {
		  color: #999;
		  display: block;
		}
		.meta_panel textarea,
		.meta_panel input[type='text'] {
		  margin-bottom: 3px;
		  width: 100%;
		}
		.meta_panel h4 {
		  color: #999;
		  font-size: 1em;
		  margin: 15px 6px;
		  text-transform:uppercase;
		}
	</style><?php
  ?>
<div class="meta_panel">
	<?php foreach($fields as $field=>$field_info) : ?>

	  <label><?php echo $field_info['label'] ?></label>
	  <input type="text" name="<?php echo $field ?>" value="<?php echo (!empty($field_info['value'])) ? $field_info['value'] : null; ?>"/>
	<?php endforeach; ?>
<?php wp_nonce_field( plugin_basename( __FILE__ ), $post->post_type.'_noncename' ); ?>
</div>
<?php echo ''; 
}

add_action( 'save_post', 'save_postdata' );
function save_postdata($post_id) {
	global $post;
	global $custom_post_types;
	if ($post && $post->post_type) {
		
		$post_type = $custom_post_types[$post->post_type];
		$custom_fields = $post_type['custom_fields'];

		if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) 	return;

		// Check permissions
		if ( 'page' == $_POST['post_type'] ) {
			if ( !current_user_can( 'edit_page', $post_id ) ) 	return;
		} else {
			if ( !current_user_can( 'edit_post', $post_id ) )	return;
		}

	  	foreach($custom_fields as $key=>$field_info) {
	    	$custom_field = $_POST[$key];
	    	if(is_null($custom_field)) { 
				delete_post_meta($post_id, $key);
	 	   	} elseif(isset($custom_field)&& !is_null($custom_field)) {
				update_post_meta($post_id,$key,$custom_field);
		    } else {
		      	add_post_meta($post_id, $key,$custom_field, TRUE);
		    }
	  	}
	}
  	return $post_id;
}