<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Active Record Class
* 活动记录类
*
* This is the platform-independent base Active Record implementation class.
* 这是独立于平台的基地活动记录的实现类。
* @package CodeIgniter
* @subpackage Drivers
* @category Database
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
class CI_DB_active_record extends CI_DB_driver {
var $ar_select = array(); //select语句
var $ar_distinct = FALSE; //是否唯一distinct
var $ar_from = array(); //from数组
var $ar_join = array(); //json
var $ar_where = array(); //where条件
var $ar_like = array(); //like
var $ar_groupby = array(); //分组
var $ar_having = array(); //having
var $ar_keys = array(); //keys
var $ar_limit = FALSE; //limit
var $ar_offset = FALSE; //offset
var $ar_order = FALSE; //排序
var $ar_orderby = array(); //orderby
var $ar_set = array(); //更新
var $ar_wherein = array(); //where in
var $ar_aliased_tables = array(); //数据表的别名数组
var $ar_store_array = array(); //存储数组
// Active Record Caching variables 活动记录缓存变量
var $ar_caching = FALSE; //缓存
var $ar_cache_exists = array(); //缓存后缀
var $ar_cache_select = array(); //缓存select
var $ar_cache_from = array(); //缓存的from
var $ar_cache_join = array(); //join
var $ar_cache_where = array(); //where
var $ar_cache_like = array(); //like
var $ar_cache_groupby = array(); //groupby
var $ar_cache_having = array(); //having
var $ar_cache_orderby = array(); //orderby
var $ar_cache_set = array(); //set
var $ar_no_escape = array(); //escape
var $ar_cache_no_escape = array(); //no_escape
// --------------------------------------------------------------------
/**
* Select
* SELECT部分
* Generates the SELECT portion of the query
* 生成的查询的SELECT部分
* @param string
* @return object
*/
public function select($select = '*', $escape = NULL)
{
//如果为字符串，那么切成数组
if (is_string($select))
{
$select = explode(',', $select);
}
//循环所有select值
foreach ($select as $val)
{
$val = trim($val); //去两边空格
if ($val != '')
{
$this->ar_select[] = $val; //加入到ar_select数组中去
$this->ar_no_escape[] = $escape; //ar_no_escape
if ($this->ar_caching === TRUE) //如果需要缓存
{
$this->ar_cache_select[] = $val; //放入select
$this->ar_cache_exists[] = 'select'; //缓存的后缀
$this->ar_cache_no_escape[] = $escape; //escape
}
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* Select Max
* 最大值
*
* Generates a SELECT MAX(field) portion of a query
* 生成SELECT MAX（场）部分查询.
* @param string the field
* @param string an alias
* @return object
*/
public function select_max($select = '', $alias = '')
{
return $this->_max_min_avg_sum($select, $alias, 'MAX');
}
// --------------------------------------------------------------------
/**
* Select Min
* 最小值
* Generates a SELECT MIN(field) portion of a query
*
* @param string the field
* @param string an alias
* @return object
*/
public function select_min($select = '', $alias = '')
{
return $this->_max_min_avg_sum($select, $alias, 'MIN');
}
// --------------------------------------------------------------------
/**
* Select Average
* 平均值
* Generates a SELECT AVG(field) portion of a query
*
* @param string the field
* @param string an alias
* @return object
*/
public function select_avg($select = '', $alias = '')
{
return $this->_max_min_avg_sum($select, $alias, 'AVG');
}
// --------------------------------------------------------------------
/**
* Select Sum
* 总和
* Generates a SELECT SUM(field) portion of a query
*
* @param string the field
* @param string an alias
* @return object
*/
public function select_sum($select = '', $alias = '')
{
return $this->_max_min_avg_sum($select, $alias, 'SUM');
}
// --------------------------------------------------------------------
/**
* Processing Function for the four functions above:
* 上述四大功能的处理功能：
* select_max() //最大值
* select_min() //最小值
* select_avg() //平均值
* select_sum() //总和
*
* @param string the field
* @param string an alias
* @return object
*/
protected function _max_min_avg_sum($select = '', $alias = '', $type = 'MAX')
{
//如果select条件为空，那么直接显示错误
if ( ! is_string($select) OR $select == '')
{
$this->display_error('db_invalid_query');
}
//strtoupper()对类型进行大写转换
$type = strtoupper($type);
//如果MAX, MIN, AVG, SUM 的话，就执行下去，不是就显示错误
if ( ! in_array($type, array('MAX', 'MIN', 'AVG', 'SUM')))
{
show_error('Invalid function type: 无效的函数类型'.$type);
}
//如果别名为空的话，生成一个表的别名
if ($alias == '')
{
$alias = $this->_create_alias_from_table(trim($select));
}
//拼写sql语句
//_protect_identifiers();函数在父类DB_driver.php
$sql = $type.'('.$this->_protect_identifiers(trim($select)).') AS '.$alias;
$this->ar_select[] = $sql; //放入到ar_select数组中去
//判断是否需要缓存
if ($this->ar_caching === TRUE)
{
$this->ar_cache_select[] = $sql;
$this->ar_cache_exists[] = 'select';
}
return $this;
}
// --------------------------------------------------------------------
/**
* Determines the alias name based on the table
* 确定基于表的别名
* @param string
* @return string
*/
protected function _create_alias_from_table($item)
{
//如果$time字符串中存在一个'.'的字符串的话，那么就用点进行分割，然后返回最后一个数组元素
if (strpos($item, '.') !== FALSE)
{
return end(explode('.', $item));
}
return $item;
}
// --------------------------------------------------------------------
/**
* DISTINCT
* DISTINCT
* Sets a flag which tells the query string compiler to add DISTINCT
* 设置一个标志，告诉编译的查询字符串添加不同的...
* @param bool
* @return object
*/
public function distinct($val = TRUE)
{
$this->ar_distinct = (is_bool($val)) ? $val : TRUE;
return $this;
}
// --------------------------------------------------------------------
/**
* From
* 征收在from部分
* Generates the FROM portion of the query
* 生成的查询部分的FROM
* @param mixed can be a string or array
* @return object
*/
public function from($from)
{
//对from变量进行循环，这里强制转换为数组 (array)$from;
foreach ((array) $from as $val)
{
//如果值存在逗号分隔符时？？
if (strpos($val, ',') !== FALSE)
{
//用逗号分隔符分分割成数组
foreach (explode(',', $val) as $v)
{
$v = trim($v); //去空格
$this->_track_aliases($v); //设置表的别名
$this->ar_from[] = $this->_protect_identifiers($v, TRUE, NULL, FALSE);
//是否缓存
if ($this->ar_caching === TRUE)
{
$this->ar_cache_from[] = $this->_protect_identifiers($v, TRUE, NULL, FALSE);
$this->ar_cache_exists[] = 'from';
}
}
}
else
{
$val = trim($val);
// Extract any aliases that might exist. We use this information
// in the _protect_identifiers to know whether to add a table prefix
// 提取任何可能存在的别名。我们使用这些信息
// 在_protect_identifiers知道是否要添加表
$this->_track_aliases($val);
$this->ar_from[] = $this->_protect_identifiers($val, TRUE, NULL, FALSE);
if ($this->ar_caching === TRUE)
{
$this->ar_cache_from[] = $this->_protect_identifiers($val, TRUE, NULL, FALSE);
$this->ar_cache_exists[] = 'from';
}
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* Join
*
* Generates the JOIN portion of the query
* 生成连接的查询部分
* @param string
* @param string the join condition 联接条件
* @param string the type of join 联接类型
* @return object
*/
public function join($table, $cond, $type = '')
{
//如果联接类型不为空
if ($type != '')
{
//转换为大写
$type = strtoupper(trim($type));
//查看类型是否为LEFT, RIGHT, OUTER, INNER, LEFT OUTER, RIGTH OUTER
if ( ! in_array($type, array('LEFT', 'RIGHT', 'OUTER', 'INNER', 'LEFT OUTER', 'RIGHT OUTER')))
{
$type = '';
}
else
{
$type .= ' ';
}
}
// Extract any aliases that might exist. We use this information
// in the _protect_identifiers to know whether to add a table prefix
// 提取任何可能存在的别名。我们使用这些信息
// 在_protect_identifiers知道是否要添加表前缀
$this->_track_aliases($table);
// Strip apart the condition and protect the identifiers
// 剥去除了条件和保护标识符
//\w 匹配包括下划线的任何单词字符。等价于'[A-Za-z0-9_]'。
//\W 匹配任何非单词字符。等价于 '[^A-Za-z0-9_]'。
//([\w\.]+) +匹配前面的子表达式一次或多次。例如，'zo+' 能匹配 "zo" 以及 "zoo"，但不能匹配 "z"。+ 等价于 {1,}。
//([\W\s]+) \s 匹配任何空白字符地，包括空格，制表符，换页符等等.等价于 [ \f\n\r\t\v]
//(.+) 匹配点出现一次或多次
//整体意思是将$cond变量由指定的正则进行分割
if (preg_match('/([\w\.]+)([\W\s]+)(.+)/', $cond, $match))
{
$match[1] = $this->_protect_identifiers($match[1]);
$match[3] = $this->_protect_identifiers($match[3]);
$cond = $match[1].$match[2].$match[3];
}
// Assemble the JOIN statement 组装的JOIN声明
$join = $type.'JOIN '.$this->_protect_identifiers($table, TRUE, NULL, FALSE).' ON '.$cond;
$this->ar_join[] = $join; //放入join数组中
//放入缓存
if ($this->ar_caching === TRUE)
{
$this->ar_cache_join[] = $join;
$this->ar_cache_exists[] = 'join';
}
return $this;
}
// --------------------------------------------------------------------
/**
* Where
*
* Generates the WHERE portion of the query. Separates
* multiple calls with AND
* 生成查询的WHERE部分。分隔多个电话及
* @param mixed
* @param mixed
* @return object
*/
public function where($key, $value = NULL, $escape = TRUE)
{
return $this->_where($key, $value, 'AND ', $escape);
}
// --------------------------------------------------------------------
/**
* OR Where
*
* Generates the WHERE portion of the query. Separates
* multiple calls with OR
* 生成WHERE条件，或操作
* @param mixed
* @param mixed
* @return object
*/
public function or_where($key, $value = NULL, $escape = TRUE)
{
return $this->_where($key, $value, 'OR ', $escape);
}
// --------------------------------------------------------------------
/**
* Where
* WHERE条件
* Called by where() or or_where()
*
* @param mixed
* @param mixed
* @param string
* @return object
*/
protected function _where($key, $value = NULL, $type = 'AND ', $escape = NULL)
{
//如果key不为数组，那么将key与$value合拼为数组放入到$key中
if ( ! is_array($key))
{
$key = array($key => $value);
}
// If the escape value was not set will will base it on the global setting
// 如果转义值没有被设置的意志会基础上的全局设置
if ( ! is_bool($escape))
{
$escape = $this->_protect_identifiers;
}
//开始循环所有字段
foreach ($key as $k => $v)
{
//如果现在还没有$this->ar_where条件存在，那么清空$type的值
$prefix = (count($this->ar_where) == 0 AND count($this->ar_cache_where) == 0) ? '' : $type;
//如果值为null并且
//$this->_has_operator($k) 测试字符串是否有一个SQL运算符
if (is_null($v) && ! $this->_has_operator($k))
{
// value appears not to have been set, assign the test to IS NULL
$k .= ' IS NULL';
}
//如果不为null值
if ( ! is_null($v))
{
if ($escape === TRUE)
{
$k = $this->_protect_identifiers($k, FALSE, $escape);
$v = ' '.$this->escape($v);
}
if ( ! $this->_has_operator($k))
{
$k .= ' = ';
}
}
else
{
$k = $this->_protect_identifiers($k, FALSE, $escape);
}
$this->ar_where[] = $prefix.$k.$v;
if ($this->ar_caching === TRUE)
{
$this->ar_cache_where[] = $prefix.$k.$v;
$this->ar_cache_exists[] = 'where';
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* Where_in
*
* 生成Where_in语句
*
* Generates a WHERE field IN ('item', 'item') SQL query joined with
* AND if appropriate
*
* @param string The field to search 字段搜索
* @param array The values searched on 值搜查
* @return object
*/
public function where_in($key = NULL, $values = NULL)
{
return $this->_where_in($key, $values);
}
// --------------------------------------------------------------------
/**
* Where_in_or
*
* Generates a WHERE field IN ('item', 'item') SQL query joined with
* OR if appropriate
*
* @param string The field to search
* @param array The values searched on
* @return object
*/
public function or_where_in($key = NULL, $values = NULL)
{
return $this->_where_in($key, $values, FALSE, 'OR ');
}
// --------------------------------------------------------------------
/**
* Where_not_in
*
* WHERE field NOT IN ('item','item')
*
* Generates a WHERE field NOT IN ('item', 'item') SQL query joined
* with AND if appropriate
*
* @param string The field to search
* @param array The values searched on
* @return object
*/
public function where_not_in($key = NULL, $values = NULL)
{
return $this->_where_in($key, $values, TRUE);
}
// --------------------------------------------------------------------
/**
* Where_not_in_or
*
* Generates a WHERE field NOT IN ('item', 'item') SQL query joined
* with OR if appropriate
*
* @param string The field to search
* @param array The values searched on
* @return object
*/
public function or_where_not_in($key = NULL, $values = NULL)
{
return $this->_where_in($key, $values, TRUE, 'OR ');
}
// --------------------------------------------------------------------
/**
* Where_in
*
* Called by where_in, where_in_or, where_not_in, where_not_in_or
*
* @param string The field to search 字段搜索
* @param array The values searched on 值搜索
* @param boolean If the statement would be IN or NOT IN 如果该语句将IN或NOT IN 是否not
* @param string
* @return object
*/
protected function _where_in($key = NULL, $values = NULL, $not = FALSE, $type = 'AND ')
{
//如果key或者value为===null时，那么直接返回
if ($key === NULL OR $values === NULL)
{
return;
}
//如果$values不为数组，转换为数组
if ( ! is_array($values))
{
$values = array($values);
}
$not = ($not) ? ' NOT' : ''; //是否需要加NOT
//将所有值放入到ar_wherein数组中去
foreach ($values as $value)
{
$this->ar_wherein[] = $this->escape($value);
}
//如果还没有一条where条件，那么$type就应该为空值了
$prefix = (count($this->ar_where) == 0) ? '' : $type;
//
$where_in = $prefix . $this->_protect_identifiers($key) . $not . " IN (" . implode(", ", $this->ar_wherein) . ") ";
$this->ar_where[] = $where_in; //放入到where条件中去
if ($this->ar_caching === TRUE)
{
$this->ar_cache_where[] = $where_in;
$this->ar_cache_exists[] = 'where';
}
// reset the array for multiple calls 重置阵列多个电话
$this->ar_wherein = array();
return $this;
}
// --------------------------------------------------------------------
/**
* Like
*
* Like 条件
* AND field like '%keyword%'
*
* Generates a %LIKE% portion of the query. Separates
* multiple calls with AND
*
* @param mixed
* @param mixed
* @return object
*/
public function like($field, $match = '', $side = 'both')
{
return $this->_like($field, $match, 'AND ', $side);
}
// --------------------------------------------------------------------
/**
* Not Like
*
* AND fieldName Not like '%keyword%'
*
* Generates a NOT LIKE portion of the query. Separates
* multiple calls with AND
*
* @param mixed
* @param mixed
* @return object
*/
public function not_like($field, $match = '', $side = 'both')
{
return $this->_like($field, $match, 'AND ', $side, 'NOT');
}
// --------------------------------------------------------------------
/**
* OR Like
*
* OR fieldName like '%keyword%'
*
* Generates a %LIKE% portion of the query. Separates
* multiple calls with OR
*
* @param mixed
* @param mixed
* @return object
*/
public function or_like($field, $match = '', $side = 'both')
{
return $this->_like($field, $match, 'OR ', $side);
}
// --------------------------------------------------------------------
/**
* OR Not Like
*
* OR fileName Not like '%keyword%'
*
* Generates a NOT LIKE portion of the query. Separates
* multiple calls with OR
*
* @param mixed
* @param mixed
* @return object
*/
public function or_not_like($field, $match = '', $side = 'both')
{
return $this->_like($field, $match, 'OR ', $side, 'NOT');
}
// --------------------------------------------------------------------
/**
* Like
*
* Called by like() or orlike()
*
* @param mixed
* @param mixed
* @param string
* @return object
*/
protected function _like($field, $match = '', $type = 'AND ', $side = 'both', $not = '')
{
//如果$field不为数组，那么将$filld与$match组成成一个数组赋值给$field
if ( ! is_array($field))
{
$field = array($field => $match);
}
//开始循环
foreach ($field as $k => $v)
{
$k = $this->_protect_identifiers($k);
//如果$this->ar_like为0那么$type将为空值
$prefix = (count($this->ar_like) == 0) ? '' : $type;
//
$v = $this->escape_like_str($v);
//如要$side为none时，那么不用百分号
if ($side == 'none')
{
$like_statement = $prefix." $k $not LIKE '{$v}'";
}
//before前面用百分号
elseif ($side == 'before')
{
$like_statement = $prefix." $k $not LIKE '%{$v}'";
}
//after 后面用百分号
elseif ($side == 'after')
{
$like_statement = $prefix." $k $not LIKE '{$v}%'";
}
else
{
//其它情况两边都用百分号
$like_statement = $prefix." $k $not LIKE '%{$v}%'";
}
// some platforms require an escape sequence definition for LIKE wildcards
// 有些平台需要一个转义序列定义LIKE通配符
// $this->_like_escape_str 在父类
if ($this->_like_escape_str != '')
{
$like_statement = $like_statement.sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
$this->ar_like[] = $like_statement; //放入到$ar_like数组中
if ($this->ar_caching === TRUE)
{
$this->ar_cache_like[] = $like_statement;
$this->ar_cache_exists[] = 'like';
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* GROUP BY
* group by 分组语句
* @param string
* @return object
*/
public function group_by($by)
{
//如果为字符串
if (is_string($by))
{
//进行分组
$by = explode(',', $by);
}
//开始循环
foreach ($by as $val)
{
$val = trim($val); //去空格
if ($val != '')
{
//将值放入到$this->ar_groupby数组中去
$this->ar_groupby[] = $this->_protect_identifiers($val);
//如果可以为缓存
if ($this->ar_caching === TRUE)
{
$this->ar_cache_groupby[] = $this->_protect_identifiers($val);
$this->ar_cache_exists[] = 'groupby';
}
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* Sets the HAVING value
* 设置值为
* Separates multiple calls with AND
* 分隔多个电话和
* @param string
* @param string
* @return object
*/
public function having($key, $value = '', $escape = TRUE)
{
return $this->_having($key, $value, 'AND ', $escape);
}
// --------------------------------------------------------------------
/**
* Sets the OR HAVING value
*
* Separates multiple calls with OR
*
* @param string
* @param string
* @return object
*/
public function or_having($key, $value = '', $escape = TRUE)
{
return $this->_having($key, $value, 'OR ', $escape);
}
// --------------------------------------------------------------------
/**
* Sets the HAVING values
*
* HAVING 可以让条件与统计函数在一起
* select Customer, SUM(OrderPrice) FROM GROUP BY Costomer HAVING SUM(OrderPrice) < 2000
* Called by having() or or_having()
*
* @param string
* @param string
* @return object
*/
protected function _having($key, $value = '', $type = 'AND ', $escape = TRUE)
{
//如果不为数组
if ( ! is_array($key))
{
$key = array($key => $value);
}
//循环
foreach ($key as $k => $v)
{
//如果$this->ar_having为0，那么不需要$type
$prefix = (count($this->ar_having) == 0) ? '' : $type;
if ($escape === TRUE)
{
$k = $this->_protect_identifiers($k);
}
//如果不为一个sql的运算符的话，那么就用=号链接
if ( ! $this->_has_operator($k))
{
$k .= ' = ';
}
if ($v != '')
{
$v = ' '.$this->escape($v);
}
$this->ar_having[] = $prefix.$k.$v;
if ($this->ar_caching === TRUE)
{
$this->ar_cache_having[] = $prefix.$k.$v;
$this->ar_cache_exists[] = 'having';
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* Sets the ORDER BY value
* 设置 ORDER BY 值
* @param string
* @param string direction: asc or desc 方向：ASC或DESC
* @return object
*/
public function order_by($orderby, $direction = '')
{
//如果方向为 random的话
if (strtolower($direction) == 'random')
{
$orderby = ''; // Random results want or don't need a field name 随机结果想要或不需要的字段名
$direction = $this->_random_keyword;
}
elseif (trim($direction) != '')
{
//查看是否为 ASC 或者 DESC
$direction = (in_array(strtoupper(trim($direction)), array('ASC', 'DESC'), TRUE)) ? ' '.$direction : ' ASC';
}
//查看是否有逗号,刟要有
if (strpos($orderby, ',') !== FALSE)
{
$temp = array();
//分割
foreach (explode(',', $orderby) as $part)
{
//去空格
$part = trim($part);
//查看$part是否存表别名数组中是否已经存在
if ( ! in_array($part, $this->ar_aliased_tables))
{
$part = $this->_protect_identifiers(trim($part));
}
//放入到$temp数组中去
$temp[] = $part;
}
//将$temp数组进行拼字字符串
$orderby = implode(', ', $temp);
}
else if ($direction != $this->_random_keyword)
{
$orderby = $this->_protect_identifiers($orderby);
}
$orderby_statement = $orderby.$direction;
$this->ar_orderby[] = $orderby_statement;
if ($this->ar_caching === TRUE)
{
$this->ar_cache_orderby[] = $orderby_statement;
$this->ar_cache_exists[] = 'orderby';
}
return $this;
}
// --------------------------------------------------------------------
/**
* Sets the LIMIT value
* 设置limit 值
* @param integer the limit value
* @param integer the offset value
* @return object
*/
public function limit($value, $offset = '')
{
$this->ar_limit = (int) $value;
if ($offset != '')
{
$this->ar_offset = (int) $offset;
}
return $this;
}
// --------------------------------------------------------------------
/**
* Sets the OFFSET value
* 设置 offset值
* @param integer the offset value
* @return object
*/
public function offset($offset)
{
$this->ar_offset = $offset;
return $this;
}
// --------------------------------------------------------------------
/**
* The "set" function. Allows key/value pairs to be set for inserting or updating
*
* @param mixed
* @param string
* @param boolean
* @return object
*/
public function set($key, $value = '', $escape = TRUE)
{
$key = $this->_object_to_array($key); //进行对象到数组的转换
//如果key值不为数组,转换为数组
if ( ! is_array($key))
{
$key = array($key => $value);
}
//开始循环
foreach ($key as $k => $v)
{
if ($escape === FALSE)
{
$this->ar_set[$this->_protect_identifiers($k)] = $v;
}
else
{
$this->ar_set[$this->_protect_identifiers($k, FALSE, TRUE)] = $this->escape($v);
}
}
return $this;
}
// --------------------------------------------------------------------
/**
* Get
*
* Compiles the select statement based on the other functions called
* and runs the query
*
* 编译select语句的基础上的其他功能称为和运行查询
*
* @param string the table
* @param string the limit clause
* @param string the offset clause
* @return object
*/
public function get($table = '', $limit = null, $offset = null)
{
if ($table != '')
{
$this->_track_aliases($table); //取别名
$this->from($table);
}
if ( ! is_null($limit))
{
$this->limit($limit, $offset);
}
$sql = $this->_compile_select(); //生成sql语句
//执行
$result = $this->query($sql);
$this->_reset_select(); //重置活动记录值
return $result;
}
/**
* "Count All Results" query
* “伯爵所有结果”查询
*
* Generates a platform-specific query string that counts all records
* returned by an Active Record query.
* 生成一个特定于平台的查询字符串中的所有记录计数
* 活动记录查询返回。
* @param string
* @return string
*/
public function count_all_results($table = '')
{
if ($table != '')
{
$this->_track_aliases($table); //取表的别名
$this->from($table); //设置from
}
//编译sql语句
$sql = $this->_compile_select($this->_count_string . $this->_protect_identifiers('numrows'));
$query = $this->query($sql); //执行
$this->_reset_select(); //重置
//如果受影响的记录数为0，直接返回0
if ($query->num_rows() == 0)
{
return 0;
}
//返回row
$row = $query->row();
return (int) $row->numrows; //返回记录数
}
// --------------------------------------------------------------------
/**
* Get_Where
*
* Allows the where clause, limit and offset to be added directly
* 允许直接添加的where子句，限制和偏移
* @param string the where clause
* @param string the limit clause
* @param string the offset clause
* @return object
*/
public function get_where($table = '', $where = null, $limit = null, $offset = null)
{
//表名
if ($table != '')
{
$this->from($table);
}
//where条件
if ( ! is_null($where))
{
$this->where($where);
}
//limit
if ( ! is_null($limit))
{
$this->limit($limit, $offset);
}
//编译sql
$sql = $this->_compile_select();
//执行
$result = $this->query($sql);
$this->_reset_select(); //重置
return $result;
}
// --------------------------------------------------------------------
/**
* Insert_Batch
* 插入_批
* Compiles batch insert strings and runs the queries
* 批量插入字符串编译并运行查询
*
* @param string the table to retrieve the results from 表中检索的结果
* @param array an associative array of insert values 插入值的关联数组
* @return object
*/
public function insert_batch($table = '', $set = NULL)
{
//如果$set不为空值时
if ( ! is_null($set))
{
$this->set_insert_batch($set);
}
if (count($this->ar_set) == 0)
{
if ($this->db_debug)
{
//No valid data array. Folds in cases where keys and values did not match up
return $this->display_error('db_must_use_set');
}
return FALSE;
}
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
// Batch this baby
for ($i = 0, $total = count($this->ar_set); $i < $total; $i = $i + 100)
{
$sql = $this->_insert_batch($this->_protect_identifiers($table, TRUE, NULL, FALSE), $this->ar_keys, array_slice($this->ar_set, $i, 100));
//echo $sql;
$this->query($sql);
}
$this->_reset_write();
return TRUE;
}
// --------------------------------------------------------------------
/**
* The "set_insert_batch" function. Allows key/value pairs to be set for batch inserts
* “set_insert_batch”功能。允许设置的键/值对批量插入
* @param mixed
* @param string
* @param boolean
* @return object
*/
public function set_insert_batch($key, $value = '', $escape = TRUE)
{
//对object转换为数组进行批量操作
$key = $this->_object_to_array_batch($key);
//数组转换
if ( ! is_array($key))
{
$key = array($key => $value);
}
//取得$key中的当前的元素，然后
// $key = current($key);
// array_keys($key);
//
$keys = array_keys(current($key));
sort($keys); //排序
//循环
foreach ($key as $row)
{
//array_diff() 计算数组的差值 将第一个参数中存在，第二个参数中不存在的值进行返回
//计算$keys与array_keys的差值个数的总值是否大0
//或者
if (count(array_diff($keys, array_keys($row))) > 0 OR count(array_diff(array_keys($row), $keys)) > 0)
{
// batch function above returns an error on an empty array 上面的批处理功能在一个空数组返回一个错误
$this->ar_set[] = array();
return;
}
ksort($row); // puts $row in the same order as our keys $行以相同的顺序，我们的钥匙
if ($escape === FALSE)
{
$this->ar_set[] = '('.implode(',', $row).')';
}
else
{
$clean = array();
foreach ($row as $value)
{
$clean[] = $this->escape($value);
}
$this->ar_set[] = '('.implode(',', $clean).')';
}
}
foreach ($keys as $k)
{
$this->ar_keys[] = $this->_protect_identifiers($k);
}
return $this;
}
// --------------------------------------------------------------------
/**
* Insert
*
* Compiles an insert string and runs the query
* 插入字符串编译并运行查询
* @param string the table to insert data into 将数据插入到表
* @param array an associative array of insert values 插入值的关联数组
* @return object
*/
function insert($table = '', $set = NULL)
{
//如果set不为空
if ( ! is_null($set))
{
$this->set($set);
}
//如果ar_set的值为空
if (count($this->ar_set) == 0)
{
if ($this->db_debug)
{
return $this->display_error('db_must_use_set');
}
return FALSE;
}
//如果$table值为空
if ($table == '')
{
//如果ar_from的第一个元素也不存在
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
//生成insertsql语句
//$this->_insert因为是由这各数据库类型进行定义的
$sql = $this->_insert($this->_protect_identifiers($table, TRUE, NULL, FALSE), array_keys($this->ar_set), array_values($this->ar_set));
$this->_reset_write(); //重置
return $this->query($sql); //执行证句
}
// --------------------------------------------------------------------
/**
* Replace
*
* Compiles an replace into string and runs the query
* 字符串替换成编译并运行查询
* @param string the table to replace data into 表的数据替换成
* @param array an associative array of insert values 插入值的关联数组
* @return object
*/
public function replace($table = '', $set = NULL)
{
if ( ! is_null($set))
{
$this->set($set);
}
if (count($this->ar_set) == 0)
{
if ($this->db_debug)
{
return $this->display_error('db_must_use_set');
}
return FALSE;
}
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
//进行替换
$sql = $this->_replace($this->_protect_identifiers($table, TRUE, NULL, FALSE), array_keys($this->ar_set), array_values($this->ar_set));
$this->_reset_write();
return $this->query($sql);
}
// --------------------------------------------------------------------
/**
* Update
*
* Compiles an update string and runs the query
* 编译更新串并运行查询
*
* @param string the table to retrieve the results from 表中检索的结果
* @param array an associative array of update values 更新值的关联数组
* @param mixed the where clause where子句
* @return object
*/
public function update($table = '', $set = NULL, $where = NULL, $limit = NULL)
{
// Combine any cached components with the current statements
// 结合任何缓存组件与当前报表
$this->_merge_cache();
if ( ! is_null($set))
{
$this->set($set);
}
//如果没有set的信息话
if (count($this->ar_set) == 0)
{
if ($this->db_debug)
{
return $this->display_error('db_must_use_set');
}
return FALSE;
}
//如果$table为空值
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
//如果有where条件的话
if ($where != NULL)
{
$this->where($where);
}
if ($limit != NULL)
{
$this->limit($limit);
}
//$this->_update(); 是写在数据库驱动内的
$sql = $this->_update($this->_protect_identifiers($table, TRUE, NULL, FALSE), $this->ar_set, $this->ar_where, $this->ar_orderby, $this->ar_limit);
$this->_reset_write(); //重置
return $this->query($sql);
}
// --------------------------------------------------------------------
/**
* Update_Batch
* 更新_批
* Compiles an update string and runs the query
* 编译更新串并运行查询
* @param string the table to retrieve the results from 表中检索的结果
* @param array an associative array of update values 更新值的关联数组
* @param string the where key 其中键
* @return object
*/
public function update_batch($table = '', $set = NULL, $index = NULL)
{
// Combine any cached components with the current statements
// 结合任何缓存组件与当前报表
$this->_merge_cache();
if (is_null($index))
{
if ($this->db_debug)
{
return $this->display_error('db_must_use_index');
}
return FALSE;
}
//如果$set不为null值
if ( ! is_null($set))
{
$this->set_update_batch($set, $index); //批量设置update的set值
}
if (count($this->ar_set) == 0)
{
if ($this->db_debug)
{
return $this->display_error('db_must_use_set');
}
return FALSE;
}
//表名
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
// Batch this baby
// 批次这个宝贝
for ($i = 0, $total = count($this->ar_set); $i < $total; $i = $i + 100)
{
$sql = $this->_update_batch($this->_protect_identifiers($table, TRUE, NULL, FALSE), array_slice($this->ar_set, $i, 100), $this->_protect_identifiers($index), $this->ar_where);
$this->query($sql);
}
$this->_reset_write();
}
// --------------------------------------------------------------------
/**
* The "set_update_batch" function. Allows key/value pairs to be set for batch updating
* “set_update_batch”功能。允许设置的键/值对批更新
* @param array
* @param string
* @param boolean
* @return object
*/
public function set_update_batch($key, $index = '', $escape = TRUE)
{
$key = $this->_object_to_array_batch($key); //批量将对象转换为数组
if ( ! is_array($key))
{
// @todo error
}
foreach ($key as $k => $v)
{
$index_set = FALSE;
$clean = array();
foreach ($v as $k2 => $v2)
{
if ($k2 == $index)
{
$index_set = TRUE;
}
else
{
$not[] = $k.'-'.$v;
}
if ($escape === FALSE)
{
$clean[$this->_protect_identifiers($k2)] = $v2;
}
else
{
$clean[$this->_protect_identifiers($k2)] = $this->escape($v2);
}
}
if ($index_set == FALSE)
{
return $this->display_error('db_batch_missing_index');
}
$this->ar_set[] = $clean;
}
return $this;
}
// --------------------------------------------------------------------
/**
* Empty Table
* 空的表名
*
* Compiles a delete string and runs "DELETE FROM table"
* 删除字符串编译并运行“DELETE FROM表”
*
* @param string the table to empty 表为空
* @return object
*/
public function empty_table($table = '')
{
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
else
{
$table = $this->_protect_identifiers($table, TRUE, NULL, FALSE);
}
$sql = $this->_delete($table); //生成删除语句
$this->_reset_write();
return $this->query($sql);//执行
}
// --------------------------------------------------------------------
/**
* Truncate
* 截短
*
* Compiles a truncate string and runs the query
* If the database does not support the truncate() command
* This function maps to "DELETE FROM table"
* 编译的截断字符串和运行查询
* 如果数据库不支持的截断（）命令。
* 此功能映射到“DELETE FROM表”
*
* @param string the table to truncate 截断表
* @return object
*/
public function truncate($table = '')
{
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
else
{
$table = $this->_protect_identifiers($table, TRUE, NULL, FALSE);
}
$sql = $this->_truncate($table);
$this->_reset_write();
return $this->query($sql);
}
// --------------------------------------------------------------------
/**
* Delete
* 删除
*
* Compiles a delete string and runs the query
* 删除字符串编译并运行查询...
*
* @param mixed the table(s) to delete from. String or array 桌删除。字符串或数组
* @param mixed the where clause
* @param mixed the limit clause
* @param boolean
* @return object
*/
public function delete($table = '', $where = '', $limit = NULL, $reset_data = TRUE)
{
// Combine any cached components with the current statements
// 结合任何缓存组件与当前报表
$this->_merge_cache();
//如果数据表为空
if ($table == '')
{
if ( ! isset($this->ar_from[0]))
{
if ($this->db_debug)
{
return $this->display_error('db_must_set_table');
}
return FALSE;
}
$table = $this->ar_from[0];
}
//如果数据表为数组
elseif (is_array($table))
{
foreach ($table as $single_table)
{
$this->delete($single_table, $where, $limit, FALSE); //递归
}
$this->_reset_write(); //重写
return;
}
else
{
$table = $this->_protect_identifiers($table, TRUE, NULL, FALSE);
}
//是否有where条件
if ($where != '')
{
$this->where($where);
}
if ($limit != NULL)
{
$this->limit($limit);
}
//如果where条件为0，wherein条件为0，like的条件为0
if (count($this->ar_where) == 0 && count($this->ar_wherein) == 0 && count($this->ar_like) == 0)
{
if ($this->db_debug)
{
return $this->display_error('db_del_must_use_where');
}
return FALSE;
}
$sql = $this->_delete($table, $this->ar_where, $this->ar_like, $this->ar_limit);
if ($reset_data)
{
$this->_reset_write(); //重写
}
return $this->query($sql); //执行
}
// --------------------------------------------------------------------
/**
* DB Prefix
* 数据库的前缀
* Prepends a database prefix if one exists in configuration
*
* @param string the table
* @return string
*/
public function dbprefix($table = '')
{
if ($table == '')
{
$this->display_error('db_table_name_required');
}
return $this->dbprefix.$table;
}
// --------------------------------------------------------------------
/**
* Set DB Prefix
* 设置数据库的前缀
* Set's the DB Prefix to something new without needing to reconnect
*
* @param string the prefix
* @return string
*/
public function set_dbprefix($prefix = '')
{
return $this->dbprefix = $prefix;
}
// --------------------------------------------------------------------
/**
* Track Aliases
* 轨道别名
* Used to track SQL statements written with aliased tables.
* 用于跟踪与锯齿表编写的SQL语句。
* @param string The table to inspect
* @return string
*/
protected function _track_aliases($table)
{
//如果table是一个数组
if (is_array($table))
{
foreach ($table as $t)
{
$this->_track_aliases($t); //那么进行递归操作
}
return;
}
// Does the string contain a comma? If so, we need to separate
// the string into discreet statements
// 字符串是否包含一个逗号？如果是这样的话，我们需要分开
// 串入谨慎报表
//发果有逗号，我们进行分割操作
if (strpos($table, ',') !== FALSE)
{
return $this->_track_aliases(explode(',', $table));
}
// if a table alias is used we can recognize it by a space
// 如果使用表别名，我们可以辨识它的空间
//from tableName as table
if (strpos($table, " ") !== FALSE)
{
// if the alias is written with the AS keyword, remove it
// 如果别名AS关键字写入，删除
// 将AS 不管是大小写，用空格替换
//preg_replace('/\s+AS\s+/i',' ',$table);
$table = preg_replace('/\s+AS\s+/i', ' ', $table);
// Grab the alias 抓住别名
$table = trim(strrchr($table, " "));
//strrchr--取得字元最后一次出现处到结尾的字符串
//strrchr($table," ");
//这里的$table已经是别名了
// Store the alias, if it doesn't already exist
// 存储别名，如果它已经不存在...
//如果别名不存在的话，保存到ar_aliased_tables数组中去
if ( ! in_array($table, $this->ar_aliased_tables))
{
$this->ar_aliased_tables[] = $table;
}
}
}
// --------------------------------------------------------------------
/**
* Compile the SELECT statement
* 编译SELECT语句
*
* Generates a query string based on which functions were used.
* Should not be called directly. The get() function calls it.
* 基于功能生成一个查询字符串。
* 不应该直接调用。 get（）函数调用它。
* @return string
*/
protected function _compile_select($select_override = FALSE)
{
// Combine any cached components with the current statements
// 结合任何缓存组件与当前报表
$this->_merge_cache(); //确实是合并了
// ----------------------------------------------------------------
// Write the "select" portion of the query
// 写“选择”的查询部分
if ($select_override !== FALSE)
{
$sql = $select_override;
}
else
{
//如果有distinct存在
$sql = ( ! $this->ar_distinct) ? 'SELECT ' : 'SELECT DISTINCT ';
//是否有ar_select的值，如果没有用*
if (count($this->ar_select) == 0)
{
$sql .= '*';
}
else
{
// Cycle through the "select" portion of the query and prep each column name.
// The reason we protect identifiers here rather then in the select() function
// is because until the user calls the from() function we don't know if there are aliases
// 循环通过“选择”部分的每个列名的查询和准备。
// 我们之所以在这里保护标识符而不是选择（）函数
// 是因为直到用户调用（）函数，我们不知道是否有别名
foreach ($this->ar_select as $key => $val)
{
$no_escape = isset($this->ar_no_escape[$key]) ? $this->ar_no_escape[$key] : NULL;
$this->ar_select[$key] = $this->_protect_identifiers($val, FALSE, $no_escape);
}
//拼接字符串
$sql .= implode(', ', $this->ar_select);
}
}
// ----------------------------------------------------------------
// Write the "FROM" portion of the query
// 添加FROM
if (count($this->ar_from) > 0)
{
$sql .= "\nFROM ";
$sql .= $this->_from_tables($this->ar_from);
}
// ----------------------------------------------------------------
// Write the "JOIN" portion of the query
//添加 JOIN语句
if (count($this->ar_join) > 0)
{
$sql .= "\n";
$sql .= implode("\n", $this->ar_join);
}
// ----------------------------------------------------------------
// Write the "WHERE" portion of the query
// 如果where大于0或者like大于0 那么添加where语句
if (count($this->ar_where) > 0 OR count($this->ar_like) > 0)
{
$sql .= "\nWHERE ";
}
$sql .= implode("\n", $this->ar_where);
// ----------------------------------------------------------------
// Write the "LIKE" portion of the query
//添加like
if (count($this->ar_like) > 0)
{
if (count($this->ar_where) > 0)
{
$sql .= "\nAND ";
}
$sql .= implode("\n", $this->ar_like);
}
// ----------------------------------------------------------------
// Write the "GROUP BY" portion of the query
// 添加group by语句
if (count($this->ar_groupby) > 0)
{
$sql .= "\nGROUP BY ";
$sql .= implode(', ', $this->ar_groupby);
}
// ----------------------------------------------------------------
// Write the "HAVING" portion of the query
//添加HAVING主句
if (count($this->ar_having) > 0)
{
$sql .= "\nHAVING ";
$sql .= implode("\n", $this->ar_having);
}
// ----------------------------------------------------------------
// Write the "ORDER BY" portion of the query
// 写入order by
if (count($this->ar_orderby) > 0)
{
$sql .= "\nORDER BY ";
$sql .= implode(', ', $this->ar_orderby);
if ($this->ar_order !== FALSE)
{
$sql .= ($this->ar_order == 'desc') ? ' DESC' : ' ASC';
}
}
// ----------------------------------------------------------------
// Write the "LIMIT" portion of the query
//写入 limit
if (is_numeric($this->ar_limit))
{
$sql .= "\n";
$sql = $this->_limit($sql, $this->ar_limit, $this->ar_offset);
}
return $sql;
}
// --------------------------------------------------------------------
/**
* Object to Array
* 对象转换为数组
*
* Takes an object as input and converts the class variables to array key/vals
* 一个对象作为输入，并将其转换类变量数组的键/丘壑
* @param object
* @return array
*/
public function _object_to_array($object)
{
//is_object()是否为对象
if ( ! is_object($object))
{
return $object;
}
$array = array();
//get_object_vars()取得对象所有方法与属性
foreach (get_object_vars($object) as $key => $val)
{
// There are some built in keys we need to ignore for this conversion
// 有一些内置的按键，我们需要忽略此转换
//不是对象， 并且值不为数组，并且键值名不能为_parent_name
if ( ! is_object($val) && ! is_array($val) && $key != '_parent_name')
{
$array[$key] = $val;
}
}
return $array;
}
// --------------------------------------------------------------------
/**
* Object to Array
* 对象对数组
*
* Takes an object as input and converts the class variables to array key/vals
* 一个对象作为输入，并将其转换类变量数组的键/丘壑
*
* @param object
* @return array
*/
public function _object_to_array_batch($object)
{
//如查不为对象，直接返回
if ( ! is_object($object))
{
return $object;
}
$array = array();
$out = get_object_vars($object); //转为数组
$fields = array_keys($out); //取得所有键值，也就是字段名
//开始循环
foreach ($fields as $val)
{
// There are some built in keys we need to ignore for this conversion
// 有一些内置的按键，我们需要忽略此转换
if ($val != '_parent_name')
{
$i = 0;
//开始循环字段中的值，
foreach ($out[$val] as $data)
{
//然后簇入到$array变量中以$i做为键值，然后用$val做为子键值的二维数组
$array[$i][$val] = $data;
$i++;
}
}
}
return $array;
}
// --------------------------------------------------------------------
/**
* Start Cache
* 开始缓存
* Starts AR caching
* 启动AR缓存
* @return void
*/
public function start_cache()
{
$this->ar_caching = TRUE;
}
// --------------------------------------------------------------------
/**
* Stop Cache
* 停止缓存
*
* Stops AR caching
*
* @return void
*/
public function stop_cache()
{
$this->ar_caching = FALSE;
}
// --------------------------------------------------------------------
/**
* Flush Cache
* 清空缓存
*
* Empties the AR cache
* 清空AR缓存
* @access public
* @return void
*/
public function flush_cache()
{
$this->_reset_run(array(
'ar_cache_select' => array(),
'ar_cache_from' => array(),
'ar_cache_join' => array(),
'ar_cache_where' => array(),
'ar_cache_like' => array(),
'ar_cache_groupby' => array(),
'ar_cache_having' => array(),
'ar_cache_orderby' => array(),
'ar_cache_set' => array(),
'ar_cache_exists' => array(),
'ar_cache_no_escape' => array()
));
}
// --------------------------------------------------------------------
/**
* Merge Cache
* 合并缓存
*
* When called, this function merges any cached AR arrays with
* locally called ones.
* 调用时，此功能将合并任何缓存的AR阵列与当地叫的。
* @return void
*/
protected function _merge_cache()
{
//如果当前的缓存后缀为0，那么直接返回
if (count($this->ar_cache_exists) == 0)
{
return;
}
//开始循环缓存后缀
foreach ($this->ar_cache_exists as $val)
{
$ar_variable = 'ar_'.$val;
$ar_cache_var = 'ar_cache_'.$val;
//如果当前缓存的需要缓存的相应的ar_cache_$val的值为0那么直接结果该次foreach
if (count($this->$ar_cache_var) == 0)
{
continue;
}
//将$ar_variable 和$ar_cache_var的值进行合并，并去掉重复的键值 array_unique()
$this->$ar_variable = array_unique(array_merge($this->$ar_cache_var, $this->$ar_variable));
}
// If we are "protecting identifiers" we need to examine the "from"
// portion of the query to determine if there are any aliases
// 如果我们保护标识“，”我们需要审视“从”
// 的查询部分，以确定是否有任何别名
if ($this->_protect_identifiers === TRUE AND count($this->ar_cache_from) > 0)
{
$this->_track_aliases($this->ar_from);
}
$this->ar_no_escape = $this->ar_cache_no_escape;
}
// --------------------------------------------------------------------
/**
* Resets the active record values. Called by the get() function
* 重置活动记录值。 get（）函数调用
* @param array An array of fields to reset 重置字段的数组
* @return void
*/
protected function _reset_run($ar_reset_items)
{
foreach ($ar_reset_items as $item => $default_value)
{
//如果item在ar_store_array()数组中存在的话，那么设置
if ( ! in_array($item, $this->ar_store_array))
{
$this->$item = $default_value;
}
}
}
// --------------------------------------------------------------------
/**
* Resets the active record values. Called by the get() function
* 重置活动记录值。 get（）函数调用
* @return void
*/
protected function _reset_select()
{
$ar_reset_items = array(
'ar_select' => array(),
'ar_from' => array(),
'ar_join' => array(),
'ar_where' => array(),
'ar_like' => array(),
'ar_groupby' => array(),
'ar_having' => array(),
'ar_orderby' => array(),
'ar_wherein' => array(),
'ar_aliased_tables' => array(),
'ar_no_escape' => array(),
'ar_distinct' => FALSE,
'ar_limit' => FALSE,
'ar_offset' => FALSE,
'ar_order' => FALSE,
);
$this->_reset_run($ar_reset_items);
}
// --------------------------------------------------------------------
/**
* Resets the active record "write" values.
* 将活动记录“写”的价值观。
* Called by the insert() update() insert_batch() update_batch() and delete() functions
* insert（）方法调用的更新（）insert_batch，（）update_batch，（）和delete（）函数
* @return void
*/
protected function _reset_write()
{
$ar_reset_items = array(
'ar_set' => array(),
'ar_from' => array(),
'ar_where' => array(),
'ar_like' => array(),
'ar_orderby' => array(),
'ar_keys' => array(),
'ar_limit' => FALSE,
'ar_order' => FALSE
);
$this->_reset_run($ar_reset_items);
}
}
/* End of file DB_active_rec.php */
/* Location: ./system/database/DB_active_rec.php */
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