Question

我有一个简单的MySQL查询

select * from tutor where verified = 0 and alert_by < '2015-08-05' LIMIT 0,1

现在，直接通过phpMyAdmin运行它会提供所需的结果，但是，当通过一组PHP语句执行此查询时，它不会返回任何内容。下面是我在PHP中的代码

$this_date = date("Y-m-d");

$query = "select * from tutor where verified = 0 and alert_by < '$this_date' LIMIT 0,1";

$contact = mysqli_query($conn, $query);
$row = $contact->fetch_array(MYSQLI_ASSOC);

然而，$row是空的，我似乎无法弄清楚这一点。我知道这似乎微不足道，但它有点烦人。

注意：从查询中删除"and alert_by < '$this_date'"，工作正常。

Answer 1

检查

连接

$con = mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno())
{
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

像这样使用mysqli_query

$contact = mysqli_query($con,"select * from tutor where verified = 0 and alert_by < '$this_date' LIMIT 0,1");

像这样使用fetch array（示例＃2程序风格）
```
$row = mysqli_fetch_array($contact, MYSQLI_ASSOC)
```

查询将直接在MySQL上运行，但不能通过PHP运行

1 个答案: