member-function.php

/**
     * 7.Sort data function
     * Allows you to sort the data by the variables set in the $_GET
     * @return Mixed
     */
    private function sort_data( $a, $b ) {
        // Set defaults
        $orderby = 'ID';
        $order = 'asc';

        // If orderby is set, use this as the sort column
        if( !empty( $_GET['orderby'] ) ) $orderby = $_GET['orderby'];

        // If order is set use this as the order
        if( !empty( $_GET['order'] ) ) $order = $_GET['order'];

        $result = strnatcmp( $a[$orderby], $b[$orderby] );

        if( $order === 'asc' ) return $result;

        return -$result;
    }