Question

我正在尝试做这样的php select语句：

  $select = mysql_query("select * from message where receiver_id = '$receiver_id'and frm_id = '$frm_id' ORDER BY id DESC");
    while($row = mysql_fetch_array($select))
    {
        $id = urlencode(encryptor('encrypt', $result['user_id']));
        $query = mysql_query($sql);
        $result = mysql_fetch_assoc($query);
    }

但它的工作只是select from table where frm_id = $frm_id而已。

Answer 1

使用PDO可以执行以下操作：

$id = "Id wanted here";
$conn = new PDO("server", "username", "password");
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sth = $conn->prepare("SELECT * from `tablename` WHERE `receiver_id` = :id");
$sth->bindParam(':name', $id);
$sth->execute();

Answer 2

我认为有两个错误。

1：您在定义$ result之前使用$ result [＆＃39; user_id＆＃39;]。 2：$ sql没有定义。我也不确定加密方法。

Answer 3

您可以尝试：

 $select= mysql_query("select * from message where receiver_id = $receiver_id  
 and frm_id = $frm_id ORDER BY id DESC");

或

$select= mysql_query("select * from message where receiver_id = $receiver_id  
or frm_id = $frm_id ORDER BY id DESC");

PHP从语句中选择

3 个答案: