[英]mysql database connectivity error
whenever I give sign up data and press sign up button data isn't inserted into the table and it says "failed". 每当我提供注册数据并按“注册”按钮时,数据就不会插入表中,并显示“失败”。 I m not getting why is that so.
我不明白为什么会这样。 HTML code is as follow.
HTML代码如下。
<form action="connection.php" method="post">
<label for="fname" style="color: white; margin-top: 0%;">Full Name</label>
<input type="text" id="FulName" name="FullName" placeholder="Full Name">
<br>
<label for="email" style="color: white;">Email</label>
<input type="text1" id="Email" name="UserEmail" placeholder="User Email">
<br>
<label for="fname" style="color: white;">User Name</label>
<input type="text2" id="UserName" name="UserName" placeholder="User Name">
<br>
<label for="password" style="color: white;">Password</label>
<input type="Password" id="Pass" name="Pass" placeholder="User Password">
<br>
<input type="submit" value="Sign Up">
</form>
php Code is as follow. php代码如下。
define('DB_HOST', 'localhost');
define('DB_NAME', 'nfakonline');
define('DB_USER','root');
define('DB_PASSWORD','');
$con=mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD) or die("Failed to connect MySQL: " . mysqli_error());
$db=mysqli_select_db(DB_NAME,$con) or die("Failed !" . mysqli_error());
Error: Failed 错误: 失败
在mysqli中,您必须将连接对象作为第一个参数传递
$db=mysqli_select_db($con,DB_NAME) or die("Failed !" . mysqli_error($con));
Change from 从
$con=mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD) or die("Failed to connect MySQL: " . mysqli_error());
to 至
$con = mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME);
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
Simple Google search will tell you that mysqli_select_db() takes first parameter as mysql connection link and second argument as dbname. 简单的Google搜索将告诉您mysqli_select_db()将第一个参数作为mysql连接链接,将第二个参数作为dbname。
In your case it would be: 您的情况是:
mysqli_select_db($con, DB_NAME);
Also mysqli_error() takes connection link: 另外mysqli_error()带有连接链接:
mysqli_error($con);
and here is the link for you, you can read more: 这是您的链接,您可以阅读更多:
http://php.net/manual/en/mysqli.select-db.php http://php.net/manual/zh/mysqli.select-db.php
http://php.net/manual/en/mysqli.error.php http://php.net/manual/zh/mysqli.error.php
You did 2 mistakes: 您犯了2个错误:
You used a wrong syntax for mysqli_select_db(DB_NAME,$con)
. 您对
mysqli_select_db(DB_NAME,$con)
使用了错误的语法。
Correct syntax is: mysqli_select_db($con,DB_NAME)
. 正确的语法是:
mysqli_select_db($con,DB_NAME)
。
You didn't pass the connection in mysqli_error()
function. 您没有在
mysqli_error()
函数中传递连接。
Correct Syntax is: mysqli_error($con)
正确的语法是:
mysqli_error($con)
Use this PHP code: 使用此PHP代码:
<?php
define('DB_HOST', 'localhost');
define('DB_NAME', 'mywebsite');
define('DB_USER','root');
define('DB_PASSWORD','');
$con=mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD) or die("Failed to connect MySQL: " . mysqli_error());
$db=mysqli_select_db($con,DB_NAME) or die("Failed !" . mysqli_error($con));
?>
I hope, it will help you! 希望对您有帮助!
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