我要搜索关键词之后选择城市最佳访问地点，而不是点击搜索结果下方的。删除了所有类别，例如城市->访问地点->关键字。我有一些错误，请分享这个想法。
我有两个表“ tourist_city”和“ visiting_places”
1> tourist_city
city_id | city | is_enabled
==============================
1 | Delhi | 1
==============================
2 | Mumbai | 1
==============================
3 | Goa | 1
==============================
4 | kolkata | 1
===============================
2> visiting_places
vid | city_id | visiting_place | history |is_enabled
==============================================================================
1 | 1 |Red Fort |The Red Fort was the residence.. | 1
==============================================================================
2 | 1 |Lotus Temple | The Lotus Temple, new Delhi | 1
==============================================================================
3 | 2 |Gateway of India |The Gateway of India..... | 1
==============================================================================
4 | 2 |Elephanta Caves |Elephanta Caves are a network.. | 1
==============================================================================
5 | 3 |Marine Drive |Marine Drive is a 3.5-kilometre..| 1
==============================================================================
6 | 3 |Fort Aguada |The fort was constructed in.. | 1
==============================================================================
7 | 4 |Victoria Memorial|The Victoria Memorial is a large | 1
==============================================================================
8| 4 |Dakhshineswar |The Victoria Memorial is a large | 1
==============================================================================
数据库在下面的代码下工作正常...
db.php
<?php
class Db {
private $hostname = 'localhost';
private $username = 'root';
private $password = '';
private $database = 'test';
private $conn;
public function __construct() {
$this->conn = mysqli_connect($this->hostname, $this->username, $this->password, $this->database);
if(!$this->conn) {
echo 'Database not connected';
}
}
public function getTouristCity(){
$query = "SELECT * FROM tourist_city WHERE is_enabled = '1'";
$result = mysqli_query($this->conn, $query);
return $result;
}
public function getVisitingPlaces(){
$query = "SELECT * FROM visiting_places WHERE is_enabled = '1'";
$result = mysqli_query($this->conn, $query);
return $result;
}
public function getVisitinPlaceData($cityid, $placeid , $keyword){
$sWhere = '';
$where = array();
if($cityid > 0) {
$where[] = 'V.city_id = '.$cityid.' AND V.is_enabled = "1"';
}
if($placeid > 0) {
$where[] = 'V.vid = '.$placeid;
}
if($keyword != '') {
$keyword = trim($keyword);
$where[] = "( V.visiting_place LIKE '%$keyword%' OR V.history LIKE '%$keyword%' OR C.city LIKE '%$keyword%' )";
}
$sWhere = implode(' AND ', $where);
if($sWhere) {
$sWhere = 'WHERE '.$sWhere;
}
if(($cityid > 0) || ($placeid > 0) || ($keyword != '')) {
$query = "SELECT * FROM visiting_places AS V JOIN tourist_city AS C ON C.city_id = V.city_id $sWhere ";
$result = mysqli_query($this->conn, $query);
return $result;
}
}
}
?>
这是索引页某些错误
通知：未定义的变量： 47
行中的 C：\ xampp \ htdocs \ search \ index.php 中的关键字
“ class =” form-control“>
index.php
<?php
include 'db.php';
$model = new Db();
$turistCity = $model->getTouristCity();
$visitingPlace = $model->getVisitingPlaces();
$searchdata = [];
if (isset($_POST['search'])) {
$searchdata = $model->getVisitinPlaceData($_POST['city'],
$_POST['place'], $_POST['keyword']);
}
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
</head>
<body>
<div style="width: 50%; margin: 0 auto;">
<div class="hidden-sm bg-info" style="padding: 10px;">
<form action="" method="post" >
<div class="col-sm-3">
<select name="city" class="form-control">
<option value="0">Select City</option>
<?php foreach($turistCity as $city) {
$checked = ($_POST['city'] == $city[city_id])? 'selected' : '';
echo '<option value="'.$city[city_id].'" '.$checked.'>'.$city[city].'</option>';
}
?>
</select>
</div>
<div class="col-sm-3">
<select name="place" class="form-control">
<option value="0">Select Visiting Place</option>
<?php foreach($visitingPlace as $place) {
$checked1 = ($_POST['place'] == $place[vid])? 'selected' : '';
echo '<option value="'.$place[vid].'" '.$checked1.'>'.$place[visiting_place].'</option>';
}
?>
</select>
</div>
<div class="col-sm-3">
<input type="text" name="keyword" placeholder="Keword" value="<?php echo $_POST['keyword']; ?>" class="form-control" />
</div>
<button name="search" class="btn btn-primary">Search</button>
</form>
</div>
<div class="hidden-md bg-warning" style="padding: 10px;">
<table cellpadding="10" cellspacing="10" class="table table-striped">
<thead>
<tr>
<th>ID</th>
<th>City</th>
<th>Place</th>
<th>History</th>
</tr>
</thead>
<tbody>
<?php
$i = 1;
if(count($searchdata) > 0 ){
foreach($searchdata as $places) {
echo '<tr>';
echo '<th>'.$i.'</th>';
echo '<td>'.$places[city].'</td>';
echo '<td>'.$places[visiting_place].'</td>';
echo '<td>'.$places[history].'</td>';
echo '</tr>';
$i++;
}
}
else {
echo '<td colspan="4">No Search Result Found.</td>';
}
?>
</table>
</div>
</div>
</body>
</html>
答案 0 :(得分：0)
添加如下条件：
如果未提交表单，则$_POST最初将不可用。
$searchdata = [];
if (isset($_POST['city'])) {
$searchdata = $model->getVisitinPlaceData($_POST['city'], $_POST['place'], $_POST['keyword']);
}
如何检查是否设置了值并修复错误：
<?
$keyword = '';
if (isset($_POST['keyword'])) {
$keyword = $_POST['keyword'];
}
?>
<input type="text" name="keyword" placeholder="Keword" value="<?php echo $keyword;?>" class="form-control">