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我只想选择 authorId 仅为 1 和 2 的帖子。我这样做是这样的:
$array = [1,2];
$array = implode(", ",$array);
$sql = "SELECT * FROM post WHERE authorId = ({$array})";
$res = $con->query($sql);
while($row = $res->fetch_assoc()){
echo $row['firstname'] . ' ' . $row['lastname'];
}
我收到错误信息:
Fatal error: Call to a member function fetch_assoc() on boolean in C:\xampp\blablaba.php on line blablaba
但是当我尝试只从一位作者那里获取帖子时,我没有收到任何错误消息。实际上它有效,这是我的一个 authorId 的代码:
$sql = "SELECT * FROM post WHERE authorId = 1)";
$res = $con->query($sql);
while($row = $res->fetch_assoc()){
echo $row['firstname'] . ' ' . $row['lastname'];
}