我想使用一个表单在Ubuntu Server中查询mysql数据库。数据库正在连接，但不知何故，结果没有按照代码中的要求得到响应。这是我的样本代码
<?php
$var=$_REQUEST['IP'];
echo "$var";
mysql_connect('localhost','root','mysql','syslog')
or die("Unable to connect to the database");
$result=mysql_query("SELECT * FROM arp_table");
$row=mysql_fetch_row($result);
echo $row[0];
?>
我确信它正在连接到数据库，因为它没有显示die消息，但除了分配连接到表单的变量之外，它没有做任何事情。
根据您提供的代码，您传递给mysql_connect的参数是错误的。
resource mysql_connect ([ string $server = ini_get("mysql.default_host") [, string $username = ini_get("mysql.default_user") [, string $password = ini_get("mysql.default_password") [, bool $new_link = false [, int $client_flags = 0 ]]]]] )
第四个参数是new_link，而不是数据库的名称。尝试以下代码-
<?php
$var = $_REQUEST['IP'];
echo $var;
mysql_connect( "localhost", "root", "mysql" ) or die("Unable to connect to the database");
mysql_select_db( "syslog" );
$result = mysql_query( "SELECT * FROM arp_table" );
$row = mysql_fetch_row( $result );
print_r( $row );
?>
希望能有所帮助：）
<?php
// instance of pdo
$config['db'] = array
(
'host' => 'localhost',
'username' => 'root',
'password' => '',
'dbname' => 'syslog'
);
$dbh = new PDO('mysql:host=' . $config['db']['host'] .
';dbname=' . $config['db']['dbname'],
$config['db']['username'],
$config['db']['password']);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// in another file where you are including the connection script call upon global
global $dbh;
// $query becomes a pdo object
$query = $dbh->prepare("SELECT * FROM `arp_table`");
$query->execute();
$result= $query->fetchAll();
print_r($result);
?>