Abstract deletes from the database

gistfile1.php

<?php

/**
 * Delete from one|multiple tables in the database
 * 
 * @param string $identifier = ''
 * @param array|string $tables
 * @param string $where
 * @param array $options = array()
 * @param resource $connection = null
 * 
 * @return int the number of affected rows
 */
function smf_db_delete($identifier = '', $tables, $where, array $values = array(), array $options = array(), $connection = null)
{
	global $smcFunc;

	$tables = is_array($tables) ? $tables : array($tables);

	if (empty($smcFunc['db_multi_table_delete']) && count($tables) > 1)
	{
		$affected_rows = 0;
		foreach ($tables as $table)
			$affected_rows += smf_db_delete($identifier, $table, $options, $options);

		return $affected_rows;
	}

	$table_string = trim(implode($tables, ', '), ', ');

	// Create the update query
	$query = '
	DELETE FROM ' . $table_string . '
	WHERE ' . $options['where'];

	$query .= !empty($options['sort']) ? "\n ORDER BY " . $options['sort'] : '';
	$query .= !empty($options['limit']) ? "\n LIMIT " . $options['limit'] : '';

	$smcFunc['db_query']($identifier, $query, $values, $connection);

	return $smcFunc['db_affected_rows']($connection);
}