Your IP : 216.73.216.97
<?php
/**
* CommonPlugin for phplist.
*
* This file is a part of CommonPlugin.
*
* @category phplist
*
* @author Duncan Cameron
* @copyright 2011-2018 Duncan Cameron
* @license http://www.gnu.org/licenses/gpl.html GNU General Public License, Version 3
*/
namespace phpList\plugin\Common;
use SqlFormatter;
/**
* This class provides an interface to the phplist database subroutines.
*/
class DB
{
private $logger;
/**
* Executes a query.
* Logs the query using a callback so that the sql is formatted only when logging is enabled.
*
* @param string $sql the query
*
* @return \mysqli_result
*/
private function _query($sql)
{
$level = error_reporting(0);
$startTime = microtime(true);
$resource = Sql_Query($sql);
$elapsed = microtime(true) - $startTime;
$callback = new StringCallback(
function () use ($sql, $elapsed) {
$formatted = SqlFormatter::format($sql, false);
$elapsed = $elapsed * 1000;
return "elapsed time $elapsed ms\n$formatted";
}
);
$this->logger->debug($callback);
error_reporting($level);
if (!$resource) {
throw new \Exception('A problem with the query: ' . $sql);
}
return $resource;
}
public function __construct()
{
$this->logger = Logger::instance();
}
/**
* Runs a query and returns the id of the inserted row.
*
* @param string $sql the query
*
* @return int
*/
public function queryInsertId($sql)
{
$resource = $this->_query($sql);
return Sql_Insert_Id();
}
/**
* Runs a query and returns the number of rows affected.
*
* @param string $sql the query
*
* @return int
*/
public function queryAffectedRows($sql)
{
$resource = $this->_query($sql);
return Sql_Affected_Rows();
}
/**
* Runs a query and returns all the results.
*
* @param string $sql the query
* @param string $keyColumn optional result column to use as the key
*
* @return DBResultIterator iterator
*/
public function queryAll($sql, $keyColumn = null)
{
$resource = $this->_query($sql);
$count = Sql_Num_Rows($resource);
return new DBResultIterator($resource, $count, $keyColumn);
}
/**
* Runs a query and returns the first row of the results.
*
* @param string $sql the query
*
* @return array|null associative array of the row or null when the result is empty
*/
public function queryRow($sql)
{
$resource = $this->_query($sql);
return Sql_Fetch_Assoc($resource);
}
/**
* Runs a query and returns a single value.
*
* @param string $sql the query
* @param string $field unused, remains for backward compatibility
*
* @return string|false the field value or false if no rows
*/
public function queryOne($sql, $field = null)
{
$resource = $this->_query($sql);
$row = Sql_Fetch_Row($resource);
return is_array($row) ? $row[0] : false;
}
/**
* Runs a query and returns an array containing all result values of a single field.
*
* @param string $sql the query
* @param string $field a named field to return or null to return the first field
* @param string $field a named field to use as the index
*
* @return array
*/
public function queryColumn($sql, $field = null, $index = null)
{
$array = iterator_to_array($this->queryAll($sql));
if (count($array) == 0) {
return [];
}
if ($field === null) {
$field = array_key_first($array[0]);
}
return array_column($array, $field, $index);
}
}