使用HTML表单选择和php输入文本来搜索数据库
[英]Search DB using HTML form select and text input with php
问题描述
I have a problem with my php project where I have to search my database using specific parameters given by the user. 
我的php项目有问题，我必须使用用户提供的特定参数来搜索数据库。
This is my index.php where ALL content in printed out from database enter image description here 这是我的index.php，从数据库打印出来的所有内容都在此处输入图像描述
On my search page I have form from wich you have to choose product type ("keyboard, graphics card, motherboard....") and enter MAXIMUM PRICE for that product type, and then page returns content from database that meets the requirements parameters. 在我的搜索页面上，我有一张表格，您必须选择产品类型（“键盘，图形卡，主板...”），然后为该产品类型输入MAXIMUM PRICE，然后页面从数据库中返回满足要求参数的内容。
this is my code for now html part 这是我现在的代码
<html>
<body>
<form name="search" action="" method="post">
<p>
Odaberite proizvod:
<select id="proizvod" selected="selected">
<option value="tipkovnica">Tipkovnica</option>
<option value="graficka">Graficka kartica</option>
<option value="maticna">Maticna ploca</option>
<option value="kuciste">Kuciste</option>
</select>
</p>
<p>
Cijena do:
<input type="text" name="cijena" value="">
</p>
<p>
<input type="submit" name="trazi" value="Trazi">
</p>
</form>
this is what I have for now enter image description here 这就是我现在要输入的图像描述
and if I click on submit I get this error 如果我单击提交，我会收到此错误
Notice: Undefined index: proizvod in D:\\Program Files (x86)\\EasyPHP-DevServer-14.1VC11\\data\\localweb\\projects\\RWA\\contentSearch.php on line 25
Fatal error: Call to a member function setFetchMode() on a non-object in D:\\Program Files (x86)\\EasyPHP-DevServer-14.1VC11\\data\\localweb\\projects\\RWA\\contentSearch.php on line 32
and php part where I don't have a clue about how should I give that parameters to database... 和php部分，在这里我不知道如何将参数赋予数据库...
<?php
if (isset($_POST["trazi"]))
{
$proizvod1 = $_POST['proizvod'];
$cijenaDo = $_POST['cijena'];
//getting all from database
try
{
$sql = 'SELECT id, proizvod, ime, cijena, slika FROM proizvodi WHERE proizvod LIKE '.$proizvod1.' ORDER BY ID ASC';
$q = $conn->query($sql);
$q->setFetchMode(PDO::FETCH_ASSOC);
}
catch (PDOException $pe)
{
die("Could not connect to the database $dbname :" . $pe->getMessage());
}
//PRINTING OUT THE TALBE WITH CONTENT
?>
<table border="0"><tr>
<?php
$i=0;
$start = true;
while ($r = $q->fetch()):
if($i %2 == 0 && !$start)
{
echo '</tr><tr>';
}
?>
<td><a href="proizvod.php?id=<?php echo $r['id']; ?>"><img src="<?php echo $r['slika']; ?>" width="300"></a></td>
<td>
<div class="naziv"><h3><a href="proizvod.php?id=<?php echo $r['id']; ?>"><?php echo $r['ime']; ?></a></h3></div>
<div class="identifikator_modela">Proizvod: <?php echo $r['proizvod']; ?></div>
<div class="cijena">Cijena:<b> <?php echo $r['cijena'] . ' kn'; ?></b></div>
</td>
<?php $i++; $start = false; endwhile; ?>
</tr></table>
<?php } ?>
</body>
please help me and thank you in advance 请帮助我，谢谢你
1 个解决方案
解决方案1
0 已采纳 2016-01-23 13:01:56
Add
nameattribute for select tag<select name="proizvod" id="proizvod" selected="selected">为选择标签添加name属性<select name="proizvod" id="proizvod" selected="selected">Add single quote for
$proizvod1(note: use a'string'afterLIKE):为$proizvod1添加单引号（注意：在LIKE之后使用'string'）：
$sql = 'SELECT id, proizvod, ime, cijena, slika FROM proizvodi WHERE proizvod LIKE \\''.$proizvod1.'\\' ORDER BY ID ASC';
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