方法1： mysql_connect

        # mysql
        $host = '11.22.27.138';
        $user = 'ithomer';
        $pass = 'yanggang';
        $dbname = 'proxy_ithomer_net';
        
        $query = "select * from proxy_all limit 0,10;";		
        $link = mysql_connect($host, $user, $pass);
        mysql_select_db($dbname);
        $result = mysql_query($query);
        while($line = mysql_fetch_array($result, MYSQL_ASSOC)){
			print($line["ip"].":");
			print($line["port"]."</br>");
		}

方法2： mysqli

<?php
$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'my_db');
if ($mysqli->connect_error) {
    die('Connect Error (' . $mysqli->connect_errno . ') '
            . $mysqli->connect_error);
}
if (mysqli_connect_error()) {
    die('Connect Error (' . mysqli_connect_errno() . ') '
            . mysqli_connect_error());
}

echo 'Success... ' . $mysqli->host_info . "\n";
$mysqli->close();
?> 

或

		# mysqli
        $host = '11.22.27.138';
        $user = 'ithomer';
        $pass = 'yanggang';
        $dbname = 'proxy_ithomer_net';
        
        $query = "select * from proxy_all limit 0,10;";		
        $mysqli = new mysqli();
        $mysqli->connect($host, $user, $pass, $dbname, 3306);

      	print("++++++mysqlli info".$mysqli->host_info."</br>");
      	
        $result = $mysqli->query($query);
        while($line = mysqli_fetch_assoc($result)){
			print($line["ip"].":");
			print($line["port"]."</br>");
		}
		$mysqli->close();

方法3：PDO

PDO:
$dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass);

MYSQLI:
$link = mysqli_connect(   
                'localhost',  /* The host to connect to 连接MySQL地址 */   
                'user',      /* The user to connect as 连接MySQL用户名 */   
                'password',  /* The password to use 连接MySQL密码 */   
                'world');    /* The default database to query 连接数据库名称*/   
      
    if (!$link) {   
       printf("Can't connect to MySQL Server. Errorcode: %s ", mysqli_connect_error());   
       exit;   
    }   

或

		# pdo_mysql
        $host = '11.22.27.138';
        $user = 'ithomer';
        $pass = 'yanggang';
        $dbname = 'proxy_ithomer_net';
        
        $query = "select * from proxy_all limit 0,10;";		
        $dsn = sprintf("mysql:host=%s;dbname=%s", $host, $dbname);
        print($dsn."</br>");
        
        $pdo = new PDO($dsn, $user, $pass);
        $result = $pdo->query($query);
        while($row = $result->fetch()) {
			print_r($row["ip"].":");
			print_r($row["port"]."</br>");
		}

解决Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in

php 5个版本，5.2、5.3、5.4、5.5，怕跟不上时代，新的服务器直接上5.5，但是程序出现如下错误：Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in，看意思就很明了，说mysql_connect这个模块将在未来弃用，请你使用mysqli或者PDO来替代。

解决方法1：

禁止php报错

display_errors = On
改为
display_errors = Off

鉴于这个服务器都是给用户用的，有时候他们需要报错(…都是给朋友用的)，不能这做，让他们改程序吧，看方案2.

解决方法2：

常用的php语法连接mysql如下

<?php
$link = mysql_connect('localhost', 'user', 'password');
mysql_select_db('dbname', $link);

改成mysqi
<?php
$link = mysqli_connect('localhost', 'user', 'password', 'dbname');

常用mysql建表SQL如下

<?php
//  老的
mysql_query('CREATE TEMPORARY TABLE `table`', $link);
// 新的
mysqli_query($link, 'CREATE TEMPORARY TABLE `table`');

解决方法三：
在php程序代码里面设置报警级别

<?php
error_reporting(E_ALL ^ E_DEPRECATED);

Deprecated的问题就这样解决掉了，不过还是建议大家尽快取消mysql的用户，全部都走向mysqli或者mysqlnd等等。mysql确实是太不安全而且太老旧了。