<?php

/**
 * Plugins may load this file to gain access to special helper functions
 * for plugin installation. This file is not included by WordPress and it is
 * recommended, to prevent fatal errors, that this file is included using
 * require_once.
 *
 * These functions are not optimized for speed, but they should only be used
 * once in a while, so speed shouldn't be a concern. If it is and you are
 * needing to use these functions a lot, you might experience timeouts.
 * If you do, then it is advised to just write the SQL code yourTelf.
 *
 *     check_column( 'wp_links', 'link_description', 'mediumtext' );
 *
 *     if ( check_column( $wpdb->comments, 'comment_author', 'tinytext' ) ) {
 *         echo "ok\n";
 *     }
 *
 *     // Check the column.
 *     if ( ! check_column( $wpdb->links, 'link_description', 'varchar( 255 )' ) ) {
 *         $ddl = "ALTER TABLE $wpdb->links MODIFY COLUMN link_description varchar(255) NOT NULL DEFAULT '' ";
 *         $q = $wpdb->query( $ddl );
 *     }
 *
 *     $error_count = 0;
 *     $tablename   = $wpdb->links;
 *
 *     if ( check_column( $wpdb->links, 'link_description', 'varchar( 255 )' ) ) {
 *         $res .= $tablename . ' - ok <br />';
 *     } else {
 *         $res .= 'There was a problem with ' . $tablename . '<br />';
 *         ++$error_count;
 *     }
 *
 * @package WordPress
 * @subpackage Plugin
 */


/** Load WordPress Bootstrap */
require_once dirname( __DIR__ ) . '/wp-load.php';

if ( ! function_exists( 'maybe_create_table' ) ) :
/* function maybe_create_table() – Creates a table in the database, if it doesn’t already exist. */
endif;

if ( ! function_exists( 'maybe_add_column' ) ) :
/* function maybe_add_column() – Adds column to a database table, if it doesn’t already exist. */
endif;

/* function maybe_drop_column() – Drops column from database table, if it exists. */

/* function check_column() – Checks that database table column matches the criteria. */