mysqli_query() 没有响应，甚至 mysqli_error() 也没有给出错误信息

Question

我正在尝试将数据插入mysqli 数据库。与数据库的连接已成功建立。但是没有插入数据。即使mysqli_eror()也没有显示任何错误。

我的代码：

<?php

  $name=$_POST['name'];
  $email=$_POST['email'];
  $password=$_POST['password'];

  $con=mysqli_connect("localhost","root","password","vote") ||
  die("couldn't connect to database");

  if(!$con){
    die("Could't connect to database. try again");
  }
  else{
    echo "connected to db"; /* connection established successfully */
    $query="INSERT INTO candidate(ID,name,email,password)
    VALUES(0,'$name','$email','$password' ) ";
    $result=mysqli_query($con,$query);
    echo ($result)? '1':mysqli_error($con);
  }

?>

转到phpmyadmin 我运行相同的插入查询并插入了数据。

但是这段代码没有插入数据。甚至 mysqli_error($con) 返回一个 空字符串。

我在Ubuntu 14.04上使用XAMPP

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Answer 1

我认为这是造成问题的原因，

 $con=mysqli_connect("localhost","root","password","vote") ||
      die("couldn't connect to database");

改成

 $con=mysqli_connect("localhost","root","password","vote") or
                                                           ^
      die("couldn't connect to database");

或者

$con = mysqli_connect("localhost", "root", "password", "vote");

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

如果您没有看到错误，请尝试在文件中添加 error_reporting(E_ALL);。