Where.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\db;
use ArrayAccess;
class Where implements ArrayAccess
{
/**
* 查询表达式
* @var array
*/
protected $where = [];
/**
* 是否需要增加括号
* @var bool
*/
protected $enclose = false;
/**
* 创建一个查询表达式
*
* @param array $where 查询条件数组
* @param bool $enclose 是否增加括号
*/
public function __construct(array $where = [], $enclose = false)
{
$this->where = $where;
$this->enclose = $enclose;
}
/**
* 设置是否添加括号
* @access public
* @param bool $enclose
* @return $this
*/
public function enclose($enclose = true)
{
$this->enclose = $enclose;
return $this;
}
/**
* 解析为Query对象可识别的查询条件数组
* @access public
* @return array
*/
public function parse()
{
$where = [];
foreach ($this->where as $key => $val) {
if ($val instanceof Expression) {
$where[] = [$key, 'exp', $val];
} elseif (is_null($val)) {
$where[] = [$key, 'NULL', ''];
} elseif (is_array($val)) {
$where[] = $this->parseItem($key, $val);
} else {
$where[] = [$key, '=', $val];
}
}
return $this->enclose ? [$where] : $where;
}
/**
* 分析查询表达式
* @access protected
* @param string $field 查询字段
* @param array $where 查询表达式
* @return array
*/
protected function parseItem($field, $where = [])
{
$op = $where[0];
$condition = isset($where[1]) ? $where[1] : null;
if (is_array($op)) {
// 同一字段多条件查询
array_unshift($where, $field);
} elseif (is_null($condition)) {
if (in_array(strtoupper($op), ['NULL', 'NOTNULL', 'NOT NULL'], true)) {
// null查询
$where = [$field, $op, ''];
} elseif (in_array($op, ['=', 'eq', 'EQ', null], true)) {
$where = [$field, 'NULL', ''];
} elseif (in_array($op, ['<>', 'neq', 'NEQ'], true)) {
$where = [$field, 'NOTNULL', ''];
} else {
// 字段相等查询
$where = [$field, '=', $op];
}
} else {
$where = [$field, $op, $condition];
}
return $where;
}
/**
* 修改器 设置数据对象的值
* @access public
* @param string $name 名称
* @param mixed $value 值
* @return void
*/
public function __set($name, $value)
{
$this->where[$name] = $value;
}
/**
* 获取器 获取数据对象的值
* @access public
* @param string $name 名称
* @return mixed
*/
public function __get($name)
{
return isset($this->where[$name]) ? $this->where[$name] : null;
}
/**
* 检测数据对象的值
* @access public
* @param string $name 名称
* @return boolean
*/
public function __isset($name)
{
return isset($this->where[$name]);
}
/**
* 销毁数据对象的值
* @access public
* @param string $name 名称
* @return void
*/
public function __unset($name)
{
unset($this->where[$name]);
}
// ArrayAccess
public function offsetSet($name, $value)
{
$this->__set($name, $value);
}
public function offsetExists($name)
{
return $this->__isset($name);
}
public function offsetUnset($name)
{
$this->__unset($name);
}
public function offsetGet($name)
{
return $this->__get($name);
}
}