我的页面加载时间很长，我无法进入它

Question

我在20分钟前问过这个问题，但当我插入代码时，站点需要很长时间才能加载。10分钟后，我收到以下错误消息：

Warning: mysql_connect(): MySQL server has gone away in C:\xampp\htdocs\ShareLife\inc\scripts\mysql_connect.inc.php on line 11  

Warning: mysql_connect(): Error while reading greeting packet. PID=2252 in C:\xampp\htdocs\ShareLife\inc\scripts\mysql_connect.inc.php on line 11  

Warning: mysql_connect(): MySQL server has gone away in C:\xampp\htdocs\ShareLife\inc\scripts\mysql_connect.inc.php on line 11  

Fatal error: Maximum execution time of 30 seconds exceeded in C:\xampp\htdocs\ShareLife\inc\scripts\mysql_connect.inc.php on line 11

使用以下代码：

<?php
$conn_error = 'Colud not connect.';

$mysql_host = "localhost:8080";
$mysql_user = "liam";
$mysql_pass = "";

$mysql_db = 'socialnetwork';


mysql_connect($mysql_host, $mysql_user, $mysql_pass) or die("Couldn't Connect") ;
mysql_select_db('mysql_db') or die($conn_error);

echo 'Connected!';
?>

Answer 1

您正在使用字符串作为变量：

mysql_select_db('mysql_db') or die($conn_error);

应该是：

mysql_select_db($mysql_db) or die($conn_error);

应为×2

// make your db the current db http://php.net/manual/en/function.mysql-select-db.php
$db_selected = mysql_select_db($mysql_db);
if (!$db_selected) {
    die ("Can\'t use $mysql_db : " . mysql_error());
}

但确实应该是（使用PDO，更改所有代码）：

    try {
        $DB= new PDO('mysql:host=localhost;dbname=socialnetwork', 'liam', '');
    } catch (PDOException $e) {
        print "Error!: " . $e->getMessage() . "<br/>";
        die();
    }