PHP PDO库
我有以下代码:PHP PDO库,php,mysql,pdo,Php,Mysql,Pdo,我有以下代码: <?php require_once('./include/database.php'); error_reporting(E_ALL); $sth = $dbh->prepare('SELECT * FROM category_home WHERE parentid = 0'); $sth->execute(); while ($cat = $sth->fetch(PDO::FETCH_ASSOC)) { $sth2 = $dbh->p
<?php
require_once('./include/database.php');
error_reporting(E_ALL);
$sth = $dbh->prepare('SELECT * FROM category_home WHERE parentid = 0');
$sth->execute();
while ($cat = $sth->fetch(PDO::FETCH_ASSOC))
{
$sth2 = $dbh->prepare('SELECT * FROM category_home WHERE parentid = :parentid');
$sth2->bindValue(':parentid', $cat['categoryid']);
$sth2->execute();
print '<strong>' . htmlspecialchars_uni($cat['name']) . '</strong><br />';
while ($subcat = $sth2->fetch(PDO::FETCH_ASSOC))
{
print '- ' . htmlspecialchars_uni($subcat['name']) . '<br />';
}
}
?>
当我运行它时,主要类别的列表被输出到屏幕上,但子类别仅为第一个类别输出
看起来我做错什么了吗
谢谢。您在db中有相应的子类别吗?请尝试
$sth2->closeCursor()在你把所有的都取出来之后。事实上我发现我用错了钥匙。。。它是$cat['id',而不是$cat['categoryid']。更改此选项修复了问题。