如何使用PDO在PHP中获取结果数组?

时间:2012-06-06 09:44:39

标签: php mysql pdo

我只是在阅读了SQL注入攻击后编辑了我的搜索脚本。我正在尝试使用PDO而不是常规的mysql连接从我的脚本中获取相同的功能。所以我一直在阅读有关PDO的其他帖子,但我不确定。这两个脚本会提供相同的功能吗?

使用PDO:

$pdo = new PDO('mysql:host=$host; dbname=$database;', $user, $pass);
$stmt = $pdo->prepare('SELECT * FROM auction WHERE name = :name');
$stmt->bindParam(':name', $_GET['searchdivebay']);
$stmt->execute(array(':name' => $name);

使用常规mysql:

$dbhost = @mysql_connect($host, $user, $pass) or die('Unable to connect to server');

@mysql_select_db('divebay') or die('Unable to select database');
$search = $_GET['searchdivebay'];
$query = trim($search);

$sql = "SELECT * FROM auction WHERE name LIKE '%" . $query . "%'";



if(!isset($query)){
echo 'Your search was invalid';
exit;
} //line 18

$result = mysql_query($trim);
$numrows = mysql_num_rows($result);
mysql_close($dbhost);

我继续使用常规示例来使用

while($i < $numrows){
$row = mysql_fetch_array($result);

从数据库创建匹配结果的数组。如何使用PDO执行此操作?

3 个答案:

答案 0 :(得分:61)

查看PDOStatement.fetchAll方法。您还可以在迭代器模式中使用fetch

来自PHP文档的fetchAll的代码示例:

<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();

/* Fetch all of the remaining rows in the result set */
print("Fetch all of the remaining rows in the result set:\n");
$result = $sth->fetchAll(\PDO::FETCH_ASSOC);
print_r($result);

结果:

Array
(
    [0] => Array
        (
            [NAME] => pear
            [COLOUR] => green
        )

    [1] => Array
        (
            [NAME] => watermelon
            [COLOUR] => pink
        )
)

答案 1 :(得分:7)

有三种方法可以获取PDO语句返回的多行。

最简单的就是迭代PDOStatement本身:

$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// iterating over a statement
foreach($stmt as $row) {
    echo $row['name'];
}

另一个是在熟悉的while语句中使用fetch()方法获取行:

$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// using while
while($row = $stmt->fetch()) {
    echo $row['name'];
}

但对于现代Web应用程序,我们应该将数据库迭代与输出分开,因此最方便的方法是使用fetchAll()方法一次获取所有行:

$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// fetching rows into array
$data = $stmt->fetchAll();

然后在模板中输出它们:

<ul>
<?php foreach($data as $row): ?>
    <li><?=$row['name']?></li>
<?php endforeach ?>
</ul>

请注意,PDO支持many sophisticated fetch modes, allowing fetchAll() to return data in many different formats

答案 2 :(得分:-2)

$st = $data->prepare("SELECT * FROM exampleWHERE example LIKE :search LIMIT 10");