小编use*_*000的帖子

当我尝试通过以下命令在Ubuntu 11.04中安装autoconf时

sudo apt-get install autoconf

这个错误来了

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package autoconf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'autoconf' has no installation candidate

如何删除此错误并安装它？

我的代码只显示一个没有文本的空白页面。为什么mysql_connect无法连接到数据库？

我使用的 MySQL 版本是 5.0.77，PHP 版本是 5.1.6

$user = "user";
$password = "user";
#$database = "database";

$con = mysql_connect("localhost",$user,$password);

if (!con) {
    echo "could not connect";
} else {
    echo "connected";
}

if (mysql_query("CREATE DATABASE my_db",$con)) {
     echo "databse created";
}

#@mysql_select_db($database) or die( "Unable to select database");
#$query="CREATE TABLE tablename(id int(6) NOT NULL auto_increment,first varchar(15) NOT NULL,last varchar(15) NOT NULL,field1-name varchar(20) NOT NULL,field2-name varchar(20) NOT NULL,field3-name varchar(20) NOT NULL,field4-name varchar(30) NOT NULL,field5-name varchar(30) NOT NULL,PRIMARY KEY (id),UNIQUE …