回音mysqli_connect_errno不起作用 [英] Echoing mysqli_connect_errno not working

问题描述

开始学习PHP，然后学习了基本知识，这很容易，因为我在学校学习C ++，而且大多数东西都相似，所以我从mysql开始.一切正常，但connect_errno无法正常工作.

复制并粘贴此 http://php.net/manual/zh/mysqli.connect-errno.php 进入我的代码，没有成功.

我的几行代码:

<?php

error_reporting(0);

$db = mysqli_connect('127.0.0.1' , 'root' , '' , 'mydb');

if ($db->connect_errno) {
    die('Connect Error: ' . $db->connect_errno);
}

?>

我还尝试了教程中的示例，但没有成功.

答案在下面！

解决方案

您混合了面向对象方法和过程方法.以下是面向对象方法的示例.

$db = new mysqli('127.0.0.1' , 'root' , '' , 'mydb');

if ( $db->connect_errno ) {
    die('Connect Error: ' . $db->connect_errno);
}

error_reporting( 0 );将消除错误，因此，如果您在调试工作流程中并需要查看这些错误，则需要将错误报告指令更新为error_reporting( E_ALL );.

此外，我将代码名更新为mydb，如代码所示(我在本地计算机上将其切换为尝试连接/错误).

Started learning PHP and after learning the basic stuff, which was easy because I learn C++ at school and most of the stuff is similar, I started with mysql. Everything works fine, but I can't get to work the connect_errno working.

Copied and pasted this http://php.net/manual/en/mysqli.connect-errno.php into my code with no success.

My few lines of code:

<?php

error_reporting(0);

$db = mysqli_connect('127.0.0.1' , 'root' , '' , 'mydb');

if ($db->connect_errno) {
    die('Connect Error: ' . $db->connect_errno);
}

?>

I've also tried an example from a tutorial, no success.

EDIT: ANSWER IS BELOW!

解决方案

You mixed the Object-oriented approach and the Procedural approach. Below is the example for the OO approach.

$db = new mysqli('127.0.0.1' , 'root' , '' , 'mydb');

if ( $db->connect_errno ) {
    die('Connect Error: ' . $db->connect_errno);
}

error_reporting( 0 ); will suppress errors, so if you're in a debugging workflow and need to see those errors, you'll need to update the error reporting directive to error_reporting( E_ALL );.

Also, I updated the db name to mydb as reflected in the code (I switched that out on my local machine to experiment with connections/errors).

这篇关于回音mysqli_connect_errno不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！