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thinkphp---模糊查詢詳解

包含 RR word words desc key 怎樣 這樣的 -h

最近做項目,在做搜索模塊的時候,模糊查詢肯定少不了。

今天就詳細的看一下模糊查詢:

$where[‘title‘] = array(‘like‘,‘%‘.$words.‘%‘);
$where[‘title‘] = array(‘like‘,array(‘%‘.$words.‘%‘,‘%‘.$wordss.‘%‘));
$where[‘title‘] = array(array(‘like‘,‘%‘.$words.‘%‘),array(‘like‘,‘%‘.$wordss.‘%‘));

一、當個字段做模糊查詢。

$words = "吃"; 
$where[‘title‘] = array
(‘like‘,‘%‘.$words.‘%‘); $list = $TagDB->where($where)->select();

這樣執行的Sql是:

SELECT * FROM `tp_keywords_sanqi` WHERE `title` LIKE ‘%吃%‘ 

這個可以查詢多個字段:

$where[‘title‘] = array(‘like‘,‘%‘.$words.‘%‘);
$where[‘description‘] = array(‘like‘,‘%‘.$words.‘%‘);
$list = $TagDB->where($where)->select();

上面的壞處:很多時候,我們做的是標題 title的查詢,而且查詢的時候,要求包含 title 包含兩個或者以上的詞:

例如:

要求一:查詢標題包含 “作用” 或 “怎樣”

$words = "怎樣";
$wordss = "作用";
$where[‘title‘] = array(‘like‘,array(‘%‘.$words.‘%‘,‘%‘.$wordss.‘%‘));
$list = $TagDB->where($where)->select();

執行的Sql是這樣的:

SELECT * FROM `tp_keywords_sanqi` WHERE (`title` LIKE ‘%怎樣%‘ OR `title` LIKE ‘%作用%‘) 

要求二:查詢標題中同時包含 “作用” 和 ”怎樣“ ;

$words = "怎樣";
$wordss = "作用";
$where[‘title‘] = array(array(‘like‘,‘%‘.$words.‘%‘),array(‘like‘,‘%‘.$wordss.‘%‘));
$list = $TagDB->where($where)->select();

執行的sql是這樣的:

SELECT * FROM `tp_keywords_sanqi` WHERE ( `title` LIKE ‘%怎樣%‘ AND `title` LIKE ‘%作用%‘ ) 

當然啦!還可以自己寫Sql來執行:

$sql = "SELECT * FROM `tp_keywords_sanqi` WHERE `title` LIKE ‘%什麽%‘;";
$sql = "SELECT * FROM `tp_keywords_sanqi` WHERE (`title` LIKE ‘%什麽%‘) OR (`title` LIKE ‘%吃%‘);";
$sql = "SELECT * FROM `tp_keywords_sanqi` WHERE (`title` LIKE ‘%什麽%‘ AND `title` LIKE ‘%作用%‘)";
$list = M()->query($sql);

thinkphp---模糊查詢詳解