删除mysqli_connect警告显示在页面

Question

$mysqlServer = "***"; 
$mysqlDb = "***"; 
$mysqlUser = "***"; 
$mysqlPass = "***"; 

$conn = mysqli_connect($mysqlServer, $mysqlUser, $mysqlPass) or die("failed to connect to db"); 
mysqli_select_db($conn, $mysqlDb) or die("failed to connect select db"); 

我有这段代码，它的工作没有任何问题。但是，如果我尝试输入一个错误的SQL服务器或测试它执行错误。这将显示：

Warning: mysqli_connect(): (HY000/2002): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. 
failed to connect select db 

我不希望警告显示，如果有问题连接sql server的问题。我只是想让自己的错误显示出来。

Answer 1

2种选择方式：

• 设置error_reporing水平不显示警告http://php.net/manual/en/function.error-reporting.php
• 把@标志mysqli_connect之前，这supresses警告消息

Answer 2

把@符号每个前功能隐藏错误

$conn = @mysqli_connect($mysqlServer, $mysqlUser, $mysqlPass) or die("failed to connect to db"); 

Answer 3

试试这个：

$conn = mysqli_connect($mysqlServer, $mysqlUser, $mysqlPass, $mysqlDb); 

传递数据库名称，connect作为第四参数。