我正在尝试使用此代码创建一个小型搜索功能来查看数据库:
$searchQ = 'Li';
$query = $connDB->prepare('SELECT * FROM topic WHERE topic_name LIKE '."':keywords'");
$query->bindValue('keywords', '%' . $searchQ . '%');
$query->execute();
if (!$query->rowCount() == 0) {
while ($results = $query->fetch()) {
echo $results['topic_name'] . "<br />\n";
}
} else {
echo 'Nothing found';
}
这将返回数据库中的所有项目,而不仅仅是那些相似的项目,
然后我运行了这个SQL查询:
SELECT * FROM topic WHERE topic_name LIKE '%Li%';
并按预期运行并返回所需的结果。
我错过了什么?
答案 0 :(得分:16)
从占位符中删除引号,并在绑定引用之前添加冒号:
$query = $connDB->prepare('SELECT * FROM topic WHERE topic_name LIKE :keywords');
$query->bindValue(':keywords', '%' . $searchQ . '%');
这是我的文字示例:
CREATE TABLE IF NOT EXISTS `items` (
`id` mediumint(9) NOT NULL auto_increment,
`name` varchar(30) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
INSERT INTO `items` (`id`, `name`) VALUES
(1, 'apple'),
(2, 'orange'),
(3, 'grape'),
(4, 'carrot'),
(5, 'brick');
$keyword='ap';
$sql="SELECT * FROM `items` WHERE `name` LIKE :keyword;";
$q=$dbh->prepare($sql);
$q->bindValue(':keyword','%'.$keyword.'%');
$q->execute();
while ($r=$q->fetch(PDO::FETCH_ASSOC)) {
echo"<pre>".print_r($r,true)."</pre>";
}
Array
(
[id] => 1
[name] => apple
)
Array
(
[id] => 3
[name] => grape
)
答案 1 :(得分:1)
您需要将单个变量传递给bind_param
而不是concatenated
字符串,因为参数two
必须是引用而不是值。
$keyword_to_search = '%' . $searchQ . '%';
$query->bindValue('keywords', $keyword_to_search);
答案 2 :(得分:0)
您只能绑定数据文字。 尝试
$searchQ = '%Li%'; OR $searchQ = '%'.Li.'%';
$query = $connDB->prepare('SELECT * FROM topic WHERE topic_name LIKE :keywords');
$query->bindValue('keywords', $searchQ );
答案 3 :(得分:-1)
<强> SQL 强>
CREATE TABLE IF NOT EXISTS 'news'
(`id` int(9) NOT NULL auto_increment,
`title` text NOT NULL,
PRIMARY KEY (`id`)
)
ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
insert into `items` (`id`, `title`) VALUES
(1, 'news title'),
(2, 'news title 2');
PHP
$connection = new PDO('mysql:host=localhost;dbname=YOUR_DATABASE_NAME','root','');
if (isset($_GET['store'])) {
$store = $_GET['store'];
if(!empty($store)){//condition you the remove karakter
$q=$connection->prepare("SELECT title FROM tbl_nes WHERE title LIKE :store");
$q->bindValue(':store','%'.$store.'%');
$q->execute();
while ($r = $q->fetch(PDO::FETCH_OBJ)) {
echo $r->title,"<br>";
}
}
}
<强>输出强>
1.news title
2.news title 2 ....