尝试编写实时搜索脚本 - Attempting to write a livesearch script

Attempting to write a livesearch script

本文关键字：搜索脚本实时 | 更新日期: 2023-09-27

我是第一次尝试一点ajax。我正在尝试编写一个实时搜索，其中输入的每个字符都会运行MySQL数据库的搜索。

这是我到目前为止的代码：

<!doctype html>
<html lang="en">
    <meta charset="utf-8">
    <script type="text/javascript">
        function getStates(value){
            $.post(
                    "getstates.php",
                    {partialState:value},
                    function(data){
                        $("#results").html(data);
                    });
        }
    </script>

</head>
<body>
    <input type="text" name="input" onkeyup="getStates(this.value)" /><br />
    <div id="results"></div>
</body>
</html>

获取状态.php

//test the connection
try{
    //connect to the database
    $dbh = new PDO("mysql:host=127.0.0.1;dbname=livesearch","root", "usbw");
//if there is an error catch it here
} catch( PDOException $e ) {
    //display the error
    echo $e->getMessage();
}

$partialState = $_POST['partialState'];     
$query = $dbh->prepare("SELECT state_name FROM tbl_state WHERE state_name LIKE '%$partialSate%'");      
$query->execute();      
$result = $query->fetchAll();
foreach($result AS $state){
    echo '<div>'.$state['state_name'].'</div>';
}

mySQL 数据库是使用正确的表名等正确构造的。

为什么它不从数据库返回结果状态？

问题是您在查询中输入了拼写错误：

$query = $dbh->prepare("SELECT state_name 
                        FROM tbl_state 
                        WHERE state_name 
                        LIKE '%$partialSate%'");
                                       ^^^^Missing t

应该是

$query = $dbh->prepare("SELECT state_name 
                        FROM tbl_state 
                        WHERE state_name 
                        LIKE '%$partialState%'");

但您还应该正确使用预准备的查询：固定代码：

<?php
if(isset($_POST['partialState'])){
    //test the connection
    try{
        //connect to the database
        $dbh = new PDO("mysql:host=127.0.0.1;dbname=livesearch","root", "usbw");
        $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
        $dbh->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_ASSOC);
        //if there is an error catch it here
    } catch( PDOException $e ) {
        //display the error
        echo $e->getMessage();
    }
    $query = $dbh->prepare("SELECT state_name
                            FROM tbl_state
                            WHERE state_name
                            LIKE :like");
    $query->execute(array(':like'=>'%'.$_POST['partialState'].'%'));
    $result = $query->fetchAll();
    foreach($result AS $state){
        echo '<div>'.$state['state_name'].'</div>';
    }
    die();
}
?>
<!doctype html>
<html lang="en">
    <meta charset="utf-8">
    <script src="http://code.jquery.com/jquery-latest.js"></script>
    <script type="text/javascript">
    function getStates(value){
        $.post("index.php", { "partialState":value },
        function(data){
            $("#results").html(data);
        });
    }
    </script>
</head>
<body>
<input type="text" name="input" onkeyup="getStates(this.value)" /><br />
<div id="results"></div>
</body>
</html>