我编写了代码来尝试在我的论坛上进行用户活动，并在添加此行时
$cat_id = $db->fetch("SELECT name FROM " . $prefix . "_categories WHERE id =" . mysql_real_escape_string($forum_data['cat_id']));
$page_title_pro = ' > ' . $system->present($cat_id['name']) . ' > ' . $system->present($forum_data['name']) . '';
我得到
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 's Treasures > Contests' WHERE id = '2'' at line 1
我假设 2 是我的用户 ID，在页脚中，我有这个：
$db->query("UPDATE accounts SET flocation = '$session_location', page = …我想为除了最后一个用户名之外的每个用户名添加一个逗号.例如:User1,User2,User3我该怎么做？这是我的代码:
$user_online_sql = $db->query("SELECT DISTINCT account_id FROM online WHERE account_id != '-1';");
$users = '';
while ($user_online_row = mysql_fetch_array($user_online_sql)) {
$users .= $user->name($user_online_row['account_id']) . ' ';
}
我尝试了implode函数,但它只是输出一个空白结果,这里是带有implode函数的代码:
$user_online_sql = $db->query("SELECT DISTINCT account_id FROM online WHERE account_id != '-1';");
$users = '';
while ($user_online_row = mysql_fetch_array($user_online_sql)) {
$users .= implode(', ',$user->name($user_online_row['account_id'])) . ' ';
}