PHP combined with AJAX to implement search prompt function

PHP combined with AJAX to implement the search prompt function

First create an input box; then listen to the keyup event of the input box, when the event is triggered , use AJAX request to send the input content to PHP; then PHP searches for data based on the input content and returns it; finally, the returned data is rendered.

Sample code

Client:

Server :

true));//如果需要数据库长连接，需要最后加一个参数 } catch(PDOException $e){ exit('数据库连接失败'); } return $connect; } function test($keyword){//从数据库中查找关键字的函数 $db=connectDb(); $result=$db->prepare("select 字段名 from 数据库名字 where 字段名 like ?"); $result->bindParam(1,$keyword);//第一个问号的值 $result=>execute; return $result->fetchAll(PDO::FETCH_ASSOC); } $keyword=$_GET['keyword'];//获取输入框的内容 $suggestion=test($keyword); echo json_encode($suggestion);//输出查询的结果（json格式输出） ?>

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