サマリー：<?php//加上@符 報錯信息不回顯示$db = @mysqli_connect('127.0.0.1','root','root','phpcn','3306','');//不加的話會顯示報錯的行數(shù)//$db = mysqli_connect('127.0.0.1','

<?php

//加上@符 報錯信息不回顯示

$db = @mysqli_connect('127.0.0.1','root','root','phpcn','3306','');

//不加的話會顯示報錯的行數(shù)

//$db = mysqli_connect('127.0.0.1','root','root1','phpcn','3306','');

//mysqli_connect_error() 輸出錯誤原因 不顯示第幾行

if(!$db){

exit('數(shù)據庫連接失敗'.mysqli_connect_error());

}

mysqli_close($db);

print_r($db);