ホームページ >バックエンド開発 >PHPチュートリアル >这个是pdo的bug吗?
<code>$user='test'; $pass='123456'; $dbh = new PDO('mysql:host=127.0.0.1;dbname=test', $user, $pass); $sth = $dbh->prepare("SELECT * FROM user WHERE id IN (?) ORDER BY id ASC"); $sth->execute(['456089015, 456089016, 456089017, 456089018, 456089019, 456089020, 456089021, 456089022, 456089023, 456089024, 456089025, 678689287']); $result = $sth->fetchAll(); print_r($result); </code>
其中只有678689287是存在的,结果返回为空;如果把678689287放在第一位,就有返回。
是不是个bug?
<code>$user='test'; $pass='123456'; $dbh = new PDO('mysql:host=127.0.0.1;dbname=test', $user, $pass); $sth = $dbh->prepare("SELECT * FROM user WHERE id IN (?) ORDER BY id ASC"); $sth->execute(['456089015, 456089016, 456089017, 456089018, 456089019, 456089020, 456089021, 456089022, 456089023, 456089024, 456089025, 678689287']); $result = $sth->fetchAll(); print_r($result); </code>
其中只有678689287是存在的,结果返回为空;如果把678689287放在第一位,就有返回。
是不是个bug?
用预处理的的select...in语句,你得生成与查询数量相同的占位符
<code class="php">$queryParams = [456089015, 456089016, 456089017, 456089018, 456089019, 456089020, 456089021, 456089022, 456089023, 456089024, 456089025, 678689287]; $markers = str_repeat('?,', count($queryParams) - 1) . '?'; $st = $dbh->prepare("SELECT * FROM user WHERE id IN (${markers}) ORDER BY id ASC"); $st->execute($queryParams); $result = $st->fetchAll();</code>
pdo不支持这种数组绑定
和我以前犯的错误一样,in后面的数值范围,有多少个数值,就来多少个问号,一个问号不行。