3
1300alert('标题不能为空'); window.location.href='article.add.php'";
}elseif(!isset($_POST['column']) || empty($_POST['column'])){
echo "";
}else{
$con = mysqli_connect("localhost", "root", "root", "info"); //准备SQL语句,查询用户名
$insertsql = "SELECT info FROM article WHERE title = '$title'"; //执行SQL语
$ret = mysqli_query($con,$insertsql);
if (!$ret) {
die('Query failed');
}
}
?> 
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排查一下，先看连接有没有问题，然后再检查查询语句的问题
就是我的 mysqli_query一直返回的是false