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[0] in function chmod in /var/www/hopeinstoughton_www/wp-content/plugins/simple-universal-google-analytics/main.php on line 8
[1] in function include_once in /var/www/hopeinstoughton_www/wp-settings.php on line 560
[2] in function require_once in /var/www/hopeinstoughton_www/wp-config.php on line 85
[3] in function require_once in /var/www/hopeinstoughton_www/wp-load.php on line 50
[4] in function require_once in /var/www/hopeinstoughton_www/wp-blog-header.php on line 13
[5] in function require in /var/www/hopeinstoughton_www/index.php on line 17

<?php
class Schedule_List_Table extends WP_List_Table {

	function __construct(){
		global $status, $page;
				
		//Set parent defaults
		parent::__construct( array(
			'singular'  => 'field',     //singular name of the listed records
			'plural'    => 'fields',    //plural name of the listed records
			'ajax'      => false        //does this table support ajax?
		) );
		
	}

	function column_default($item, $column_name){
		switch($column_name){
			case 'year':
				return $item[$column_name];
			default:
				return print_r($item,true); //Show the whole array for troubleshooting purposes
		}
	}

	function column_year($item){
		
		//Build row actions
		$actions = array(
			'update'   => sprintf('<a href="?page=schedule_edit&amp;id=%s">Edit</a>',$item['id']),
			'map'      => sprintf('<a href="?page=schedule_xlsx&amp;id=%s">Mapping</a>',$item['id']),
//			'delete'    => sprintf('<a href="?page=schedule_xlsx&amp;action=%s&amp;id=%s" onclick="return confirmDelete(false, \'%s\')">Delete</a>','delete',$item['id'], $item['md_name']),
		);
		
		//Return the title contents
		return sprintf('<a class="row-title" href="?page=schedule_edit&amp;id=%s">%s</a> <span style="color:silver">(id:%s)</span>%s',
					 $item['id'],
			/*$1%s*/ $item['year'],
			/*$2%s*/ $item['id'],
			/*$3%s*/ $this->row_actions($actions)
		);
	}

	function column_cb($item){
		return sprintf(
			'<input type="checkbox" name="%1$s[]" value="%2$s" />',
			/*$1%s*/ $this->_args['singular'],  //Let's simply repurpose the table's singular label ("movie")
			/*$2%s*/ $item['id']                //The value of the checkbox should be the record's id
		);
	}

	 function get_columns(){
		$columns = array(
			'cb'        => '<input type="checkbox" />', //Render a checkbox instead of text
			'year'    	=> 'Year',
		);
		return $columns;
	}

	function get_sortable_columns() {
		return array(
			'year'     => array('year',false),     //true means it's already sorted
		);
	}

	function get_bulk_actions() {
		$actions = array(
			'delete'    => 'Delete'
		);
		return $actions;
	}


	function process_bulk_action() {
		
		//Detect when a bulk action is being triggered...
		if( 'delete'===$this->current_action() ) {
			wp_die('Items deleted (or they would be if we had items to delete)!');
		}
		
	}

	function prepare_items() {
		global $wpdb;

		$per_page = 10;
		$columns = $this->get_columns();
		$hidden = [];
		$sortable = $this->get_sortable_columns();
		
		$this->_column_headers = array($columns, $hidden, $sortable);
		$this->process_bulk_action();
		
		$query = 'select option_id,option_name,option_value from ' . $wpdb->prefix . 'options where option_name like "worksheet_%"';
		$rows = $wpdb->get_results($query);
		$data = [];
		foreach($rows as $row) {
			$year = preg_match('~(\d+)~', $row->option_name, $match) ? $match[1] : '';
			if ($year > 2000) {
				$data[] = [ 'id' => $row->option_id, 'year' => $year ];
			}
		}
		
		usort($data, array($this, 'usort_reorder'));
		$current_page = $this->get_pagenum();
		$total_items = count($data);
		
		$this->items = array_slice($data,(($current_page-1)*$per_page),$per_page);
		$this->set_pagination_args( array(
			'total_items' => $total_items,
			'per_page'    => $per_page,
			'total_pages' => ceil($total_items/$per_page)
		) );
	}

	function usort_reorder($a,$b){
		$orderby = (!empty($_REQUEST['orderby'])) ? $_REQUEST['orderby'] : 'year'; //If no sort, default to year
		$order = (!empty($_REQUEST['order'])) ? $_REQUEST['order'] : 'desc'; //If no order, default to desc
		$result = strcmp($a[$orderby], $b[$orderby]); //Determine sort order
		return ($order==='asc') ? $result : -$result; //Send final sort direction to usort
	}

}