pdo绑定数据不对
<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 = $sth->fetchAll(PDO::FETCH_ASSOC); //然后。。。就没有然后了。。。数据为空 </code>
经过我的一番测试,发现如果SQL是可以地:
<code>sql</code><code>SELECT * FROM user WHERE id IN (1,2,3,4,5) </code>
但是PDO
绑定数据的时候会把SQL变为酱紫(好吧,我猜的o(╯□╰)o):
<code>sql</code><code>SELECT * FROM user WHERE id IN ('1,2,3,4,5') </code>
这特么肯定就不行了啊。。。各位大大可有解决办法,既要能绑定数据,又要不出错?
注意,以上只是简单说明,我的实际情况还要复杂得多。。。但问题我确定过了,就是这个(只有在条件为
IN
时且IN
传入了2+
才会出错)。
@netingcn 我的这种绑定方式是可以的,只是被PDO
当成一个参数值了,而我其实是5个参数值。
回复内容:
<code>php</code><code>$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 = $sth->fetchAll(PDO::FETCH_ASSOC); //然后。。。就没有然后了。。。数据为空 </code>
经过我的一番测试,发现如果SQL是可以地:
<code>sql</code><code>SELECT * FROM user WHERE id IN (1,2,3,4,5) </code>
但是PDO
绑定数据的时候会把SQL变为酱紫(好吧,我猜的o(╯□╰)o):
<code>sql</code><code>SELECT * FROM user WHERE id IN ('1,2,3,4,5') </code>
这特么肯定就不行了啊。。。各位大大可有解决办法,既要能绑定数据,又要不出错?
注意,以上只是简单说明,我的实际情况还要复杂得多。。。但问题我确定过了,就是这个(只有在条件为
IN
时且IN
传入了2+
才会出错)。
@netingcn 我的这种绑定方式是可以的,只是被PDO
当成一个参数值了,而我其实是5个参数值。
pdo不支持这种数组绑定。很早就有人提过类似的问题,详情请戳这里:
http://segmentfault.com/q/1010000000119523
附上我临时解决方案,期待哪位大大给出更好的解决办法:
<code>$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 = $sth->fetchAll(PDO::FETCH_ASSOC); </code>
要不别绑定,要不拆成字符串再绑定吧
http://php.net/manual/zh/pdostatement.execute.php
<code>$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>
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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