1,多条件模糊查询 
等于：map[‘id′]=array(‘eq′,100);不等于：map[‘id′]=array(‘eq′,100);不等于：map[‘id’] = array(‘neq’,100); 
大于 ：map[‘id′]=array(‘gt′,100);大于等于：map[‘id′]=array(‘gt′,100);大于等于：map[‘id’]=array(‘egt’,100); 
小于：map[‘id′]=array(‘lt′,100);小于等于：map[‘id′]=array(‘lt′,100);小于等于：map[‘id’]=array(‘elt’,100); 
模糊查询：map[‘name′]=array(‘like′,′thinkphpbetween:map[‘name′]=array(‘like′,′thinkphpbetween:map[‘id’]=array(‘between’,’1,8’); 
map[‘id′]=array(‘between′,array(‘1′，‘8′）)；in:map[‘id′]=array(‘between′,array(‘1′，‘8′）)；in:map[‘id’]=array(‘id’,’1,2,,3’); 
map[‘id′]=array(‘notin′,′1,2,3′);map[‘id′]=array(‘notin′,′1,2,3′);data=db('user')->where($map)->select();

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2多条件或查询 
例如 select * from tbl where a like ‘%123%’ or b like ‘%123%’ or c like ‘%123%’ ; 
实现这样的功能，thinkphp怎么写呢？

where[‘a’]=array(‘like’,”%123%”); 
where[‘b’]=array(‘like’,”%123%”); 
where[‘c’]=array(‘like’,”%123%”);

答案 :where[‘a|b|c’]=array(‘like’,”%123%”);

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3多条件分页查询保留参数 
Db::name(“table”)->where(“XXXX”)->paginate(10,false,['query'=>request()->param()]); 
paginate方法的第三个参数