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Home Backend Development PHP Tutorial 使用php时出现了no database selected的问题 求大神帮助

使用php时出现了no database selected的问题 求大神帮助

Jun 23, 2016 pm 01:35 PM

我在myadminphp中创建了名为flash的数据库  

下面是我的php代码


回复讨论(解决方案)

no database selected 没有数据库被选择

很明显,你在没有指明数据库的情况下就对表进行了操作

可是你看  我下面的代码  我不是指明了 是“flash”数据库吗

no database selected 没有数据库被选择

很明显,你在没有指明数据库的情况下就对表进行了操作



可是你看  我下面的代码  我不是指明了 是“flash”数据库吗

很遗憾,根本就看不见你的图

很遗憾,根本就看不见你的图



啊 那我发文本吧  

$username=$_POST['username'];
$userage=$_POST['userage'];
$usergender=$_POST['usergender'];

echo "用户姓名:".$username."
";
echo "用户年龄:".$userage."
";
echo "用户性别:".$usergender."
";

$host='127.0.0.1';
$root='root';
$pwd='';

$con=mysql_connect($host,$root,$pwd);

if($con==false){
echo "连接数据库失败!";
}else{
mysql_query("set name'utf8'");

mysql_select_db("flash");

$sql="INSERT INTO test(name,age,gender)
VALUES('$username','$userage','$usergender')";

if(!mysql_query($sql,$con)){
die('Error:'.mysql_error());
}
echo "添加一条记录";
mysql_close($con);
}

mysql_select_db("flash"); 需要放在mysql_query之前,以下两句交换一下位置就可以了。

mysql_select_db("flash");  // 先select db
mysql_query("set names 'utf8'"); // 再set names

mysql_query("set name'utf8'");

mysql_select_db("flash");

上面两个语句调换下位置,先选择数据库再set names

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