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Home Backend Development PHP Tutorial pdo绑定数据不对

pdo绑定数据不对

Jun 06, 2016 pm 08:32 PM
mysql pdo php

<code>php</code><code>$sql = 'SELECT * FROM user WHERE id IN (:ids)';
$pdo = new PDO('mysql:host=localhost;dbname=test','root','');
$sth->prepare($sql);
$sth->execute([':ids'=>'1,2,3,4,5']);
$users = $sth->fetchAll(PDO::FETCH_ASSOC);
//然后。。。就没有然后了。。。数据为空
</code>
Copy after login
Copy after login

经过我的一番测试,发现如果SQL是可以地:

<code>sql</code><code>SELECT * FROM user WHERE id IN (1,2,3,4,5)
</code>
Copy after login
Copy after login

但是PDO绑定数据的时候会把SQL变为酱紫(好吧,我猜的o(╯□╰)o):

<code>sql</code><code>SELECT * FROM user WHERE id IN ('1,2,3,4,5')
</code>
Copy after login
Copy after login

这特么肯定就不行了啊。。。各位大大可有解决办法,既要能绑定数据,又要不出错?

注意,以上只是简单说明,我的实际情况还要复杂得多。。。但问题我确定过了,就是这个(只有在条件为IN时且IN传入了2+才会出错)。


@netingcn 我的这种绑定方式是可以的,只是被PDO当成一个参数值了,而我其实是5个参数值。

回复内容:

<code>php</code><code>$sql = 'SELECT * FROM user WHERE id IN (:ids)';
$pdo = new PDO('mysql:host=localhost;dbname=test','root','');
$sth->prepare($sql);
$sth->execute([':ids'=>'1,2,3,4,5']);
$users = $sth->fetchAll(PDO::FETCH_ASSOC);
//然后。。。就没有然后了。。。数据为空
</code>
Copy after login
Copy after login

经过我的一番测试,发现如果SQL是可以地:

<code>sql</code><code>SELECT * FROM user WHERE id IN (1,2,3,4,5)
</code>
Copy after login
Copy after login

但是PDO绑定数据的时候会把SQL变为酱紫(好吧,我猜的o(╯□╰)o):

<code>sql</code><code>SELECT * FROM user WHERE id IN ('1,2,3,4,5')
</code>
Copy after login
Copy after login

这特么肯定就不行了啊。。。各位大大可有解决办法,既要能绑定数据,又要不出错?

注意,以上只是简单说明,我的实际情况还要复杂得多。。。但问题我确定过了,就是这个(只有在条件为IN时且IN传入了2+才会出错)。


@netingcn 我的这种绑定方式是可以的,只是被PDO当成一个参数值了,而我其实是5个参数值。

pdo不支持这种数组绑定。很早就有人提过类似的问题,详情请戳这里:

http://segmentfault.com/q/1010000000119523

附上我临时解决方案,期待哪位大大给出更好的解决办法:

<code>$ids = [1,2,3,4,5];//外部传入的数组
$sql = 'SELECT * FROM user WHERE id IN (';
foreach($ids as $id){
    $sql.=intval($id).',';
}
$sql = rtrim($sql ,',') . ')';
$pdo = new PDO('mysql:host=localhost;dbname=test','root','');
$sth->prepare($sql);
$sth->execute();
$users = $sth->fetchAll(PDO::FETCH_ASSOC);
</code>
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要不别绑定,要不拆成字符串再绑定吧

http://php.net/manual/zh/pdostatement.execute.php

<code>$ids = array(1, 2, 3, 4, 5);
$in  = implode(',', array_fill(0, count($ids), '?')); // 生成问号占位符
$sth = $dbh->prepare("SELECT * FROM table WHERE id IN ($in)");
$sth->execute($ids);
</code>
Copy after login

使用问号占位符时,execute绑定一个索引数组,所有的值作为 PDO::PARAM_STR 对待.
使用命名占位符时,execute绑定一个关联数组,所有的值作为 PDO::PARAM_STR 对待.

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