信息

 上面是phpinfo的mysql信息

上面是使用mysql连接，不报错

上面是使用mysqli连接的，连接成功

贴出代码：

<?php
$servername='127.0.0.1';
$username='root';
$password='mysql';
$dbname='mysql';
/*
$mysqli=new mysqli($servername,$username,$password,$dbname);
$mysqli->set_charset("utf8");
$result=$mysqli->query("select * from user");
echo "<pre>";
print_r($result->fetch_row());
echo "</pre>";
*/
//$con = new PDO("mysql:host=".$servername.";dbname=".$dbname,$username,$password,array(PDO::ATTR_PERSISTENT=>true));
//$con = connect($servername, $username, $password, $dbname);
$con = new mysqli($servername,$username,$password,$dbname);
if(!$con){
 echo "连接不成功";
} else {
 echo "连接成功";
}
function connect($servername, $username, $password, $dbname){
 echo "进入链接";
    $con = mysql_connect($servername, $username, $password);
    $con = mysql_select_db($dbname, $con);
 return $con;
}